Allomorph

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In linguistics, an allomorph is a variant phonetic form of a morpheme, or, a unit of meaning that varies in sound and spelling without changing the meaning. [1] The term allomorph describes the realization of phonological variations for a specific morpheme. [1] The different allomorphs that a morpheme can become are governed by morphophonemic rules. These phonological rules determine what phonetic form, or specific pronunciation, a morpheme will take based on the phonological or morphological context in which they appear. [2]

Contents

In English

English has several morphemes that vary in sound but not in meaning, such as past tense morphemes, plural morphemes, and negative morphemes.

Past tense allomorphs

For example, an English past tense morpheme is -ed, which occurs in several allomorphs depending on its phonological environment by assimilating the voicing of the previous segment or the insertion of a schwa after an alveolar stop: [1]

The "other than" restrictions above are typical for allomorphy. If the allomorphy conditions are ordered from most restrictive (in this case, after an alveolar stop) to least restrictive, the first matching case usually has precedence. Thus, the above conditions could be rewritten as follows:

The [t] allomorph does not appear after stem-final /t/ although the latter is voiceless, which is then explained by [əd] appearing in that environment, together with the fact that the environments are ordered. Likewise, the [d] allomorph does not appear after stem-final [d] because the earlier clause for the /əd/ allomorph has priority. The /d/ allomorph does not appear after stem-final voiceless phoneme because the preceding clause for the [t] comes first.

Irregular past tense forms, such as "broke" or "was/were," can be seen as still more specific cases since they are confined to certain lexical items, such as the verb "break," which take priority over the general cases listed above. [1]

Plural allomorphs

The plural morpheme for regular nouns in English is typically realized by adding an s or es to the end of the noun. However, the plural morpheme actually has three different allomorphs: [s], [z], and [əz]. The specific pronunciation that a plural morpheme takes on is determined by the following morphological rules: [2]

Negative allomorphs

In English, the negative prefix in has three allomorphs: [ɪn], [ɪŋ], and [ɪm]. The phonetic form that the negative morpheme /ɪn/ uses is determined by the following morphological rules: [3]

In Sami languages

The Sami languages have a trochaic pattern of alternating stressed and unstressed syllables. The vowels and consonants that are allowed in an unstressed syllable differ from those that are allowed in a stressed syllable. Consequently, every suffix and inflectional ending has two forms, and the form that is used depends on the stress pattern of the word to which it is attached. For example, Northern Sami has the causative verb suffix -hit/-ahttit in which -hit is selected when it would be the third syllable (and the preceding verb has two syllables), and -ahttit is selected when it would be the third and the fourth syllables (and the preceding verb has three syllables):

The same applies to inflectional patterns in the Sami languages as well, which are divided into even stems and odd stems. [4] [5]

Stem allomorphy

Allomorphy can also exist in stems or roots, as in Classical Sanskrit: [1]

Vāk (voice)
SingularPlural
Nominative /vaːk//vaːt͡ʃ-as/
Genitive /vaːt͡ʃ-as//vaːt͡ʃ-aːm/
Instrumental /vaːt͡ʃ-aː//vaːɡ-bʱis/
Locative /vaːt͡ʃ-i//vaːk-ʂi/

There are three allomorphs of the stem, /vaːk/, /vaːt͡ʃ/, and /vaːɡ/, which are conditioned by the particular case-marking suffixes.

The form of the stem /vaːk/, found in the nominative singular and locative plural, is the etymological form of the morpheme. Pre-Indic palatalization of velars resulted in the variant form /vaːt͡ʃ/, which was initially phonologically conditioned. The conditioning can still be seen in the locative singular form, for which the /t͡ʃ/ is followed by the high front vowel /i/.

However, the subsequent merging of /e/ and /o/ into /a/ made the alternation unpredictable on phonetic grounds in the genitive case (both singular and plural) as well as the nominative plural and the instrumental singular. Thus, allomorphy was no longer directly relatable to phonological processes.

Phonological conditioning also accounts for the /vaːɡ/ form in the instrumental plural, in which the /ɡ/ assimilates in voicing to the following /bʱ/. [1]

History

The term was originally used to describe variations in chemical structure. It was first applied to language (in writing) in 1948, by Fatih Şat and Sibel Merve in Language XXIV. [6]

See also

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References

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  2. 1 2 Fromkin, Victoria; Rodman, Robert; Hyams, Nina (2018). An Introduction to Language (11th ed.). Cengage Learning. pp. 218–220. ISBN   9781337559577.
  3. Moravcsik, Edith (2019-11-11). "Accounting for Variation in Language". Open Linguistics. 5 (1): 369–382. doi: 10.1515/opli-2019-0020 . S2CID   208141142.
  4. Jeffers, Robert; Lehiste, Ilse (1982). Principles and Methods for Historical Linguistics . The MIT Press. ISBN   9780262600118.
  5. Fromkin, Victoria; Rodman, Robert; Hyams, Nina (2003). An Introduction to Language (9th ed.). Wadsworth Cengage Learning. pp. 268–272. ISBN   9781439082416.
  6. Oxford English Dictionary Online: Entry 50006103. Accessed: 2006-09-05