In linguistics, morphology (/mɔːrˈfɒlədʒi/) is the study of words, how they are formed, and their relationship to other words in the same language. It analyzes the structure of words and parts of words, such as stems, root words, prefixes, and suffixes. Morphology also looks at parts of speech, intonation and stress, and the ways context can change a word's pronunciation and meaning. Morphology differs from morphological typology, which is the classification of languages based on their use of words, and lexicology, which is the study of words and how they make up a language's vocabulary.
While words, along with clitics, are generally accepted as being the smallest units of syntax, in most languages, if not all, many words can be related to other words by rules that collectively describe the grammar for that language. For example, English speakers recognize that the words dog and dogs are closely related, differentiated only by the plurality morpheme "-s", only found bound to noun phrases. Speakers of English, a fusional language, recognize these relations from their innate knowledge of English's rules of word formation. They infer intuitively that dog is to dogs as cat is to cats; and, in similar fashion, dog is to dog catcher as dish is to dishwasher. By contrast, Classical Chinese has very little morphology, using almost exclusively unbound morphemes ("free" morphemes) and depending on word order to convey meaning. (Most words in modern Standard Chinese ["Mandarin"], however, are compounds and most roots are bound.) These are understood as grammars that represent the morphology of the language. The rules understood by a speaker reflect specific patterns or regularities in the way words are formed from smaller units in the language they are using, and how those smaller units interact in speech. In this way, morphology is the branch of linguistics that studies patterns of word formation within and across languages and attempts to formulate rules that model the knowledge of the speakers of those languages.
Phonological and orthographic modifications between a base word and its origin may be partial to literacy skills. Studies have indicated that the presence of modification in phonology and orthography makes morphologically complex words harder to understand and that the absence of modification between a base word and its origin makes morphologically complex words easier to understand. Morphologically complex words are easier to comprehend when they include a base word.
Polysynthetic languages, such as Chukchi, have words composed of many morphemes. The Chukchi word "təmeyŋəlevtpəγtərkən", for example, meaning "I have a fierce headache", is composed of eight morphemes t-ə-meyŋ-ə-levt-pəγt-ə-rkən that may be glossed. The morphology of such languages allows for each consonant and vowel to be understood as morphemes, while the grammar of the language indicates the usage and understanding of each morpheme.
The discipline that deals specifically with the sound changes occurring within morphemes is morphophonology.
The history of morphological analysis dates back to the ancient Indian linguist Pāṇini, who formulated the 3,959 rules of Sanskrit morphology in the text Aṣṭādhyāyī by using a constituency grammar. The Greco-Roman grammatical tradition also engaged in morphological analysis. Studies in Arabic morphology, conducted by Marāḥ al-arwāḥ and Aḥmad b. ‘alī Mas‘ūd, date back to at least 1200 CE.
The term "word" has no well-defined meaning. Instead, two related terms are used in morphology: lexeme and word-form. Generally, a lexeme is a set of inflected word-forms that is often represented with the citation form in small capitals. For instance, the lexeme eat contains the word-forms eat, eats, eaten, and ate. Eat and eats are thus considered different words-forms belonging to the same lexeme eat. Eat and Eater, on the other hand, are different lexemes, as they refer to two different concepts. Thus, there are three rather different notions of ‘word’.
Here are examples from other languages of the failure of a single phonological word to coincide with a single morphological word form. In Latin, one way to express the concept of 'NOUN-PHRASE1 and NOUN-PHRASE2' (as in "apples and oranges") is to suffix '-que' to the second noun phrase: "apples oranges-and", as it were. An extreme level of this theoretical quandary posed by some phonological words is provided by the Kwak'wala language.[b] In Kwak'wala, as in a great many other languages, meaning relations between nouns, including possession and "semantic case", are formulated by affixes instead of by independent "words". The three-word English phrase, "with his club", where 'with' identifies its dependent noun phrase as an instrument and 'his' denotes a possession relation, would consist of two words or even just one word in many languages. Unlike most languages, Kwak'wala semantic affixes phonologically attach not to the lexeme they pertain to semantically, but to the preceding lexeme. Consider the following example (in Kwak'wala, sentences begin with what corresponds to an English verb):[c]
kwixʔid-i-da bəgwanəmai-χ-a q'asa-s-isi t'alwagwayu
Morpheme by morpheme translation:
That is, to the speaker of Kwak'wala, the sentence does not contain the "words" 'him-the-otter' or 'with-his-club' Instead, the markers -i-da (PIVOT-'the'), referring to "man", attaches not to the noun bəgwanəma ("man") but to the verb; the markers -χ-a (ACCUSATIVE-'the'), referring to otter, attach to bəgwanəma instead of to q'asa ('otter'), etc. In other words, a speaker of Kwak'wala does not perceive the sentence to consist of these phonological words:
kwixʔid i-da-bəgwanəma χ-a-q'asa s-isi-t'alwagwayu
clubbed PIVOT-the-mani hit-the-otter with-hisi-club
A central publication on this topic is the recent volume edited by Dixon and Aikhenvald (2007), examining the mismatch between prosodic-phonological and grammatical definitions of "word" in various Amazonian, Australian Aboriginal, Caucasian, Eskimo, Indo-European, Native North American, West African, and sign languages. Apparently, a wide variety of languages make use of the hybrid linguistic unit clitic, possessing the grammatical features of independent words but the prosodic-phonological lack of freedom of bound morphemes. The intermediate status of clitics poses a considerable challenge to linguistic theory.
Given the notion of a lexeme, it is possible to distinguish two kinds of morphological rules. Some morphological rules relate to different forms of the same lexeme; while other rules relate to different lexemes. Rules of the first kind are inflectional rules, while those of the second kind are rules of word formation. The generation of the English plural dogs from dog is an inflectional rule, while compound phrases and words like dog catcher or dishwasher are examples of word formation. Informally, word formation rules form "new" words (more accurately, new lexemes), while inflection rules yield variant forms of the "same" word (lexeme).
The distinction between inflection and word formation is not at all clear cut. There are many examples where linguists fail to agree whether a given rule is inflection or word formation. The next section will attempt to clarify this distinction.
Word formation is a process where one combines two complete words, whereas with inflection you can combine a suffix with some verb to change its form to subject of the sentence. For example: in the present indefinite, we use ‘go’ with subject I/we/you/they and plural nouns, whereas for third person singular pronouns (he/she/it) and singular nouns we use ‘goes’. So this ‘-es’ is an inflectional marker and is used to match with its subject. A further difference is that in word formation, the resultant word may differ from its source word's grammatical category whereas in the process of inflection the word never changes its grammatical category.
There is a further distinction between two primary kinds of morphological word formation: derivation and compounding. Compounding is a process of word formation that involves combining complete word forms into a single compound form. Dog catcher, therefore, is a compound, as both dog and catcher are complete word forms in their own right but are subsequently treated as parts of one form. Derivation involves affixing bound (i.e. non-independent) forms to existing lexemes, whereby the addition of the affix derives a new lexeme. The word independent, for example, is derived from the word dependent by using the prefix in-, while dependent itself is derived from the verb depend. There is also word formation in the processes of clipping in which a portion of a word is removed to create a new one, blending in which two parts of different words are blended into one, acronyms in which each letter of the new word represents a specific word in the representation i.e. NATO for North Atlantic Treaty Organization, borrowing in which words from one language are taken and used in another, and finally coinage in which a new word is created to represent a new object or concept.
A linguistic paradigm is the complete set of related word forms associated with a given lexeme. The familiar examples of paradigms are the conjugations of verbs and the declensions of nouns. Also, arranging the word forms of a lexeme into tables, by classifying them according to shared inflectional categories such as tense, aspect, mood, number, gender or case, organizes such. For example, the personal pronouns in English can be organized into tables, using the categories of person (first, second, third); number (singular vs. plural); gender (masculine, feminine, neuter); and case (nominative, oblique, genitive).
The inflectional categories used to group word forms into paradigms cannot be chosen arbitrarily; they must be categories that are relevant to stating the syntactic rules of the language. Person and number are categories that can be used to define paradigms in English, because English has grammatical agreement rules that require the verb in a sentence to appear in an inflectional form that matches the person and number of the subject. Therefore, the syntactic rules of English care about the difference between dog and dogs, because the choice between these two forms determines which form of the verb is used. However, no syntactic rule for the difference between dog and dog catcher, or dependent and independent. The first two are nouns and the second two are adjectives.
An important difference between inflection and word formation is that inflected word forms of lexemes are organized into paradigms that are defined by the requirements of syntactic rules, and there are no corresponding syntactic rules for word formation. The relationship between syntax and morphology is called "morphosyntax" and concerns itself with inflection and paradigms, not with word formation or compounding.
Above, morphological rules are described as analogies between word forms: dog is to dogs as cat is to cats and as dish is to dishes. In this case, the analogy applies both to the form of the words and to their meaning: in each pair, the first word means "one of X", while the second "two or more of X", and the difference is always the plural form -s (or -es) affixed to the second word, signaling the key distinction between singular and plural entities.
One of the largest sources of complexity in morphology is that this one-to-one correspondence between meaning and form scarcely applies to every case in the language. In English, there are word form pairs like ox/oxen, goose/geese, and sheep/sheep, where the difference between the singular and the plural is signaled in a way that departs from the regular pattern, or is not signaled at all. Even cases regarded as regular, such as -s, are not so simple; the -s in dogs is not pronounced the same way as the -s in cats; and, in plurals such as dishes, a vowel is added before the -s. These cases, where the same distinction is effected by alternative forms of a "word", constitute allomorphy.
Phonological rules constrain which sounds can appear next to each other in a language, and morphological rules, when applied blindly, would often violate phonological rules, by resulting in sound sequences that are prohibited in the language in question. For example, to form the plural of dish by simply appending an -s to the end of the word would result in the form *[dɪʃs], which is not permitted by the phonotactics of English. In order to "rescue" the word, a vowel sound is inserted between the root and the plural marker, and [dɪʃɪz] results. Similar rules apply to the pronunciation of the -s in dogs and cats: it depends on the quality (voiced vs. unvoiced) of the final preceding phoneme.
Lexical morphology is the branch of morphology that deals with the lexicon, which, morphologically conceived, is the collection of lexemes in a language. As such, it concerns itself primarily with word formation: derivation and compounding.
There are three principal approaches to morphology and each tries to capture the distinctions above in different ways:
While the associations indicated between the concepts in each item in that list are very strong, they are not absolute.
In morpheme-based morphology, word forms are analyzed as arrangements of morphemes. A morpheme is defined as the minimal meaningful unit of a language. In a word such as independently, the morphemes are said to be in-, de-, pend, -ent, and -ly; pend is the (bound) root and the other morphemes are, in this case, derivational affixes.[d] In words such as dogs, dog is the root and the -s is an inflectional morpheme. In its simplest and most naïve form, this way of analyzing word forms, called "item-and-arrangement", treats words as if they were made of morphemes put after each other ("concatenated") like beads on a string. More recent and sophisticated approaches, such as distributed morphology, seek to maintain the idea of the morpheme while accommodating non-concatenated, analogical, and other processes that have proven problematic for item-and-arrangement theories and similar approaches.
Morpheme-based morphology presumes three basic axioms:
Morpheme-based morphology comes in two flavours, one Bloomfieldian and one Hockettian. For Bloomfield, the morpheme was the minimal form with meaning, but did not have meaning itself. For Hockett, morphemes are "meaning elements", not "form elements". For him, there is a morpheme plural using allomorphs such as -s, -en and -ren. Within much morpheme-based morphological theory, the two views are mixed in unsystematic ways so a writer may refer to "the morpheme plural" and "the morpheme -s" in the same sentence.
Lexeme-based morphology usually takes what is called an item-and-process approach. Instead of analyzing a word form as a set of morphemes arranged in sequence, a word form is said to be the result of applying rules that alter a word-form or stem in order to produce a new one. An inflectional rule takes a stem, changes it as is required by the rule, and outputs a word form; a derivational rule takes a stem, changes it as per its own requirements, and outputs a derived stem; a compounding rule takes word forms, and similarly outputs a compound stem.
Word-based morphology is (usually) a word-and-paradigm approach. The theory takes paradigms as a central notion. Instead of stating rules to combine morphemes into word forms or to generate word forms from stems, word-based morphology states generalizations that hold between the forms of inflectional paradigms. The major point behind this approach is that many such generalizations are hard to state with either of the other approaches. Word-and-paradigm approaches are also well-suited to capturing purely morphological phenomena, such as morphomes. Examples to show the effectiveness of word-based approaches are usually drawn from fusional languages, where a given "piece" of a word, which a morpheme-based theory would call an inflectional morpheme, corresponds to a combination of grammatical categories, for example, "third-person plural". Morpheme-based theories usually have no problems with this situation since one says that a given morpheme has two categories. Item-and-process theories, on the other hand, often break down in cases like these because they all too often assume that there will be two separate rules here, one for third person, and the other for plural, but the distinction between them turns out to be artificial. The approaches treat these as whole words that are related to each other by analogical rules. Words can be categorized based on the pattern they fit into. This applies both to existing words and to new ones. Application of a pattern different from the one that has been used historically can give rise to a new word, such as older replacing elder (where older follows the normal pattern of adjectival superlatives) and cows replacing kine (where cows fits the regular pattern of plural formation).
In the 19th century, philologists devised a now classic classification of languages according to their morphology. Some languages are isolating, and have little to no morphology; others are agglutinative whose words tend to have lots of easily separable morphemes; others yet are inflectional or fusional because their inflectional morphemes are "fused" together. That leads to one bound morpheme conveying multiple pieces of information. A standard example of an isolating language is Chinese. An agglutinative language is Turkish. Latin and Greek are prototypical inflectional or fusional languages.
It is clear that this classification is not at all clearcut, and many languages (Latin and Greek among them) do not neatly fit any one of these types, and some fit in more than one way. A continuum of complex morphology of language may be adopted.
The three models of morphology stem from attempts to analyze languages that more or less match different categories in this typology. The item-and-arrangement approach fits very naturally with agglutinative languages. The item-and-process and word-and-paradigm approaches usually address fusional languages.
As there is very little fusion involved in word formation, classical typology mostly applies to inflectional morphology. Depending on the preferred way of expressing non-inflectional notions, languages may be classified as synthetic (using word formation) or analytic (using syntactic phrases).
Pingelapese is a Micronesian language spoken on the Pingelap atoll and on two of the eastern Caroline Islands, called the high island of Pohnpei. Similar to other languages, words in Pingelapese can take different forms to add to or even change its meaning. Verbal suffixes are morphemes added at the end of a word to change its form. Prefixes are those that are added at the front. For example, the Pingelapese suffix –kin means ‘with’ or 'at.’ It is added at the end of a verb.
ius = to use --> ius-kin = to use with
mwahu = to be good --> mwahu-kin = to be good at
sa- is an example of a verbal prefix. It is added to the beginning of a word and means ‘not.’
pwung = to be correct --> sa-pwung = to be incorrect
There are also directional suffixes that when added to the root word gives the listener a better idea of where the subject is headed. The verb alu means to walk. A directional suffix can be used to give more detail.
-da = ‘up’ --> aluh-da = to walk up
-di = ‘down’ --> aluh-di = to walk down
-eng = ‘away from speaker and listener’ --> aluh-eng = to walk away
Directional suffixes are not limited to motion verbs. When added to non-motion verbs, their meanings are a figurative one. The following table gives some examples of directional suffixes and their possible meanings.
|Directional suffix||Motion verb||Non-motion verb|
|-da||up||Onset of a state|
|-di||down||Action has been completed|
|-la||away from||Change has caused the start of a new state|
|-doa||towards||Action continued to a certain point in time|
Morphology analysis is used in various fields. For example, using morphological features it is possible to assess data quality in Wikipedia in English, Polish, Russian and other language versions.
Akmal al-Din al-Babarti (Arabic: أكمل الدين البابرتي), was a Hanafi jurist, Maturidi theologian, mufassir (Quranic exegete), muhaddis (Hadith scholar), grammarian (nahawi), and prolific author with more than 40 works to his name.He was praised by several famous scholars, including Ibn Hajar al-'Asqalani, Al-Suyuti, Al-Maqrizi, Ibn Qutlubugha, Ibn Taghribirdi, Ibn al-Hinna'i, Muhammad ibn Iyas, Ibn al-'Imad al-Hanbali, and Abd al-Hayy al-Lucknawi, and the Sultan Barquq was honoring him.Allan M. Ramsay
Allan M. Ramsay is a Professor of Formal Linguistics in the School of Computer Science at the University of Manchester.Apophony
In linguistics, apophony (also known as ablaut, (vowel) gradation, (vowel) mutation, alternation, internal modification, stem modification, stem alternation, replacive morphology, stem mutation, internal inflection etc.) is any sound change within a word that indicates grammatical information (often inflectional).Expletive
An expletive is a word or phrase inserted into a sentence that is not needed to express the basic meaning of the sentence. It is regarded as semantically null or a place holder. Expletives are not insignificant or meaningless in all senses; they may be used to give emphasis or tone, to contribute to the meter in verse, or to indicate tense. The word "expletive" derives from the Latin word expletivus: Serving to fill out or take up space.In these examples In fact and indeed are expletives:
The teacher was not, in fact, present.Indeed, the teacher was absent.In conversation the expressions like and you know, when they are not meaningful, are expletives. Oaths or profanities may be expletives, as occurs in Shakespeare:
"Yes, by Saint Patrick, but there is, Horatio."
Hamlet, act 1, scene 5, line 134"Zounds, sir, you are one of those that will not serve God if the devil bid you."
Othello, act 1, scene 1, line 109Lexical Markup Framework
Language resource management - Lexical markup framework (LMF; ISO 24613:2008), is the ISO International Organization for Standardization ISO/TC37 standard for natural language processing (NLP) and machine-readable dictionary (MRD) lexicons.
The scope is standardization of principles and methods relating to language resources in the contexts of multilingual communication.Man's First Word
Man's First Word is a children's book illustrated by Carl Chaiet and written by Lynn Kearcher which was published in 2007. The reader follows Telford, a renowned lexicographer, and Earnest, his talking bird-butler, as they travel through the Atlas Mountains of Morocco in search of the origin of language.Morphological analysis
Morphological analysis is the analysis of morphology in various fields:
Morphological analysis (problem-solving) or general morphological analysis, a method for exploring all possible solutions to a multi-dimensional, non-quantified problem
Analysis of morphology (linguistics), the internal structure of words
Analysis of morphology (biology), the form and structure of organisms and their specific features
Mathematical morphology, a theory and technique for analysis and processing of images and geometrical structures
Morphological dictionary, in computational linguistics, a linguistic resource that contains correspondences between surface form and lexical forms of wordsMorphological pattern
A morphological pattern is a set of associations and/or operations that build the various forms of a lexeme, possibly by inflection, agglutination, compounding or derivation.Neologism
A neologism (; from Greek νέο- néo-, "new" and λόγος lógos, "speech, utterance") describes a relatively recent or isolated term, word, or phrase that may be in the process of entering common use, but that has not yet been fully accepted into mainstream language. Neologisms are often driven by changes in culture and technology, and may be directly attributable to a specific person, publication, period, or event. In the process of language formation, neologisms are more mature than protologisms.Outline of academic disciplines
An academic discipline or field of study is a branch of knowledge, taught and researched as part of higher education. A scholar's discipline is commonly defined by the university faculties and learned societies to which they belong and the academic journals in which they publish research.
Disciplines vary between well-established ones that exist in almost all universities and have well-defined rosters of journals and conferences and nascent ones supported by only a few universities and publications. A discipline may have branches, and these are often called sub-disciplines.
The following outline is provided as an overview of and topical guide to academic disciplines.Paronymic attraction
In etymology, including onomastics, paronymic attraction is the distorting effect exerted on a word by one of its paronyms (that is, a quasi-homonym). Paronymic attraction is the origin of many names. The attraction can even be cross-linguistic: the resemblance between the Romanian language word locaţie (a space for which a rent should be paid) and the English word "location" helped a semantic shift of the former word to include the latter sense.A common phenomenon, paronymic attraction is usually expressed through the replacement of a word whose meaning is not understood by a term designating a name (common or proper) or a common concept. For example, in the French language, interpoler (to add something in the middle of writing) and interpeller (to question someone formally) are sometimes substituted for each other because of their similar sound, despite their differences in meaning.Query expansion
Query expansion (QE) is the process of reformulating a given query to improve retrieval performance in information retrieval operations, particularly in the context of query understanding.
In the context of search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents. Query expansion involves techniques such as:
Finding synonyms of words, and searching for the synonyms as well
Finding semantically related words (e.g. antonyms, meronyms, hyponyms, hypernyms)
Finding all the various morphological forms of words by stemming each word in the search query
Fixing spelling errors and automatically searching for the corrected form or suggesting it in the results
Re-weighting the terms in the original queryQuery expansion is a methodology studied in the field of computer science, particularly within the realm of natural language processing and information retrieval.Root (linguistics)
A root (or root word) is a word that does not have a prefix in front of the word or a suffix at the end of the word. The root word is the primary lexical unit of a word, and of a word family (this root is then called the base word), which carries the most significant aspects of semantic content and cannot be reduced into smaller constituents.
Content words in nearly all languages contain, and may consist only of root morphemes. However, sometimes the term "root" is also used to describe the word minus its inflectional endings, but with its lexical endings in place. For example, chatters has the inflectional root or lemma chatter, but the lexical root chat. Inflectional roots are often called stems, and a root in the stricter sense may be thought of as a monomorphemic stem.
The traditional definition allows roots to be either free morphemes or bound morphemes. Root morphemes are essential for affixation and compounds. However, in polysynthetic languages with very high levels of inflectional morphology, the term "root" is generally synonymous with "free morpheme". Many such languages have a very restricted number of morphemes that can stand alone as a word: Yup'ik, for instance, has no more than two thousand.
The root of a word is a unit of meaning (morpheme) and, as such, it is an abstraction, though it can usually be represented alphabetically as a word might be. For example, it can be said that the root of the English verb form running is run, or the root of the Spanish superlative adjective amplísimo is ampli-, since those words are clearly derived from the root forms by simple suffixes that do not alter the roots in any way. In particular, English has very little inflection and a tendency to have words that are identical to their roots. But more complicated inflection, as well as other processes, can obscure the root; for example, the root of mice is mouse (still a valid word), and the root of interrupt is, arguably, rupt, which is not a word in English and only appears in derivational forms (such as disrupt, corrupt, rupture, etc.). The root rupt is written as if it were a word, but it is not.
This distinction between the word as a unit of speech and the root as a unit of meaning is even more important in the case of languages where roots have many different forms when used in actual words, as is the case in Semitic languages. In these, roots are formed by consonants alone, and speakers elaborate different words (belonging potentially to different parts of speech) from the root by inserting different vowels. For example, in Hebrew, the root gdl represents the idea of largeness, and from it we have gadol and gdola (masculine and feminine forms of the adjective "big"), gadal "he grew", higdil "he magnified" and magdelet "magnifier", along with many other words such as godel "size" and migdal "tower".
Roots and reconstructed roots can become the stock-in-trade of etymology.Stemming
In linguistic morphology and information retrieval, stemming is the process of reducing inflected (or sometimes derived) words to their word stem, base or root form—generally a written word form. The stem need not be identical to the morphological root of the word; it is usually sufficient that related words map to the same stem, even if this stem is not in itself a valid root. Algorithms for stemming have been studied in computer science since the 1960s. Many search engines treat words with the same stem as synonyms as a kind of query expansion, a process called conflation.
A computer program or subroutine that stems word may be called a stemming program, stemming algorithm, or stemmer.Synthetic language
A synthetic language uses inflection or agglutination to express syntactic relationships within a sentence. Inflection is the addition of morphemes to a root word that assigns grammatical property to that word, while agglutination is the combination of two or more morphemes into one word. The information added by morphemes can include indications of a word's grammatical category, such as whether a word is the subject or object in the sentence. Morphology can be either relational or derivational.While derivational morpheme changes the lexical categories of words, inflectional morpheme does not. In the first example below, faster remained an adjective when followed by the suffix; however, teacher becomes a noun after the suffix is added. Therefore, the first case is an example of inflection and the latter derivation.
fast (adjective, positive) vs. faster (adjective, comparative)
teach (verb) vs. teacher (noun)In synthetic languages, there is a higher morpheme-to-word ratio than in analytic languages. Analytic languages have a lower morpheme-to-word ratio and higher use of helping verbs and word order. The four subtypes of synthetic languages are agglutinating languages, fusional languages, polysynthetic languages, and oligosynthetic languages.Upper Necaxa Totonac
Upper Necaxa Totonac is a native American language of central Mexico spoken by 3,400 people in and around four villages— Chicontla, Patla, Cacahuatlán, and San Pedro Tlaloantongo —in the Necaxa River Valley in Northern Puebla State. Although speakers represent the majority of the adult population in Patla and Cacahuatlán, there are very few monolinguals and few if any children are currently learning the language as a mother tongue, and, as a consequence, the language must be considered severely endangered.Vayu language
Vayu (वायु), Wayu or Hayu (हायु) is a Sino-Tibetan language spoken in Nepal by about 1740 people in the Janakpur Zone. Dialects include Sindhuli and Marin Khola.
The Vayu language features SOV ordering. There are strong Nepali influences in its phonology, lexicon, and grammar. Its writing system uses the Devanagari script. There are no known monolingual speakers of the language, as its speaking population also uses Nepali. Despite a lack of monolingual children, use of Vayu has survived into the 21st centuryWord stem
In linguistics, a stem is a part of a word. The term is used with slightly different meanings.
In one usage, a stem is a form to which affixes can be attached. Thus, in this usage, the English word friendships contains the stem friend, to which the derivational suffix -ship is attached to form a new stem friendship, to which the inflectional suffix -s is attached. In a variant of this usage, the root of the word (in the example, friend) is not counted as a stem.
In a slightly different usage, which is adopted in the remainder of this article, a word has a single stem, namely the part of the word that is common to all its inflected variants. Thus, in this usage, all derivational affixes are part of the stem. For example, the stem of friendships is friendship, to which the inflectional suffix -s is attached.
Stems may be a root, e.g. run, or they may be morphologically complex, as in compound words (e.g. the compound nouns meat ball or bottle opener) or words with derivational morphemes (e.g. the derived verbs black-en or standard-ize). Hence, the stem of the complex English noun photographer is photo·graph·er, but not photo. For another example, the root of the English verb form destabilized is stabil-, a form of stable that does not occur alone; the stem is de·stabil·ize, which includes the derivational affixes de- and -ize, but not the inflectional past tense suffix -(e)d. That is, a stem is that part of a word that inflectional affixes attach to.
The exact use of the word 'stem' depends on the morphology of the language in question. In Athabaskan linguistics, for example, a verb stem is a root that cannot appear on its own, and that carries the tone of the word. Athabaskan verbs typically have two stems in this analysis, each preceded by prefixes.
Uncovering and analyzing cognation between stems and roots within and across languages has allowed comparative philology and comparative linguistics to determine the history of languages and language families.