| Assimilation (linguistics) |
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Assimilation is a typical Sound Change process by which the phonetics of a speech segment becomes more like that of another segment in a word (or at a word boundary), so that a change of phoneme occurs. A common example of assimilation would be "don't be silly" where the and in "don't" become and , where said naturally in many accents and discourse styles. A related process is Coarticulation where one segment influences another to produce an allophonic variation, such as vowels acquiring the feature {Link without Title} before nasal consonants when the Velum opens prematurely or becoming labialised as in "boot". This article will describe both processes under the term, assimilation. The physiological or psychological mechanisms of coarticulation are unknown, but we often loosely speak of a segment as "triggering" an assimilatory change in another segment. In assimilation, the phonological patterning of the language, discourse styles and accent are some of the factors contributing to changes observed. There are four configurations found in assimilations: an increase in phonetic similarity between adjacent segments and between segments separated by one or more intervening segments; and the changes may be in reference to a preceding segment or a following one. Although all four occur, changes in regard to a following adjacent segment account for virtually all assimilatory changes (and most of the regular ones). And assimilations to an adjacent segment are vastly more frequent than assimilations to a non-adjacent one. (These radical asymmetries might contain hints about the mechanisms involved, but they are unobvious.) If a sound changes with reference to a following segment, it is traditionally called "regressive assimilation"; changes with reference to a preceding segment are traditionally called "progressive". Many find these terms confusing, as they seem to mean the opposite of the intended meaning. Accordingly, a variety of alternative terms have arisen—not all of which avoid the problem of the traditional terms. Regressive assimilation is also known as right-to-left or anticipatory assimilation. Progressive assimilation is also known as left-to-right or perseveratory or preservative or lag assimilation. The terms anticipatory and lag will be used here. Very occasionally two sounds (invariably adjacent) may influence one another in reciprocal assimilation. When such a change results in a single segment with some of the features of both components, it is known as coalescence or fusion. Some authorities distinguish between partial and complete assimilation, i.e., between assimilatory changes in which there remains some phonetic difference between the segments involved, and those in which all differences are obliterated. There is no theoretical advantage to such a classification, as one of the following examples will show. Tonal Language s may exhibit tone assimilation (tonal umlaut, in effect), while Sign Languages also exhibit assimilation when the characteristics of neighbouring phonemes may be mixed. EXAMPLES Anticipatory assimilation to a contiguous segment This is the commonest type of assimilation by far and typically has the character of a conditioned sound change, i.e., it applies to the whole lexicon. Thus in Latin, prefixes ending in a nasal (''com''- "with" (also marks completive action); ''in''- "in(to)" (also marks "ingression", i.e. the commencement of an action); ''in''- (forms privative adjectives)) all show the following assimilatory changes relative to a following adjacent segment: All become before , , and : impendeō "hang over", imbibō "drink in", immēnsus "immeasurable" All become before , , and : contāminō "render unclean", connīveō "lower the eyes; be complicit', condōnō "give away, present" All become or before and , respectively: corrumpō "break to pieces", irrētiō "entangle in a net", irrāsus "unshaved", illūdō "play with", illīterātus "ignorant, unlettered", colloquor "converse, talk with", collūdō "play with" (but usually "have a secret understanding with"). The assimilation to before or is not shown in writing.
Anticipatory assimilation at a distance Rare, and usually merely an accident in the history of a specific word. Old French ''cercher'' "to chase" > Modern Fr. chercher . However, the diverse and common assimilations known as Umlaut , wherein the phonetics of a vowel are influenced by the phonetics of a vowel in a following syllable, are both commonplace and in the nature of sound laws. Such changes abound in the histories of Germanic Languages , Romanian, Old Irish , and many others.
Lag assimilation to a contiguous segment
Lag assimilation at a distance Rare, and usually sporadic (except when part of something bigger, as in the Skt. ''śaśa''- example, above): Greek ''leirion'' > Lat. ''līlium'' "lily". Vowel Harmony is the reverse of umlaut, namely, a following vowel's phonetics is influenced by that of a preceding vowel. Thus for example most Finnish case markers come in two flavors, with and (written ''ä'') depending on whether the preceding vowel is back or front. However, it's a difficult question to know just where and how in the history of Finnish an actual ''assimilatory change'' took place. The ''distribution'' of pairs of endings in Finnish is just that, is not in any sense the operation of an assimilatory innovation (though probably the outbirth of such an innovation in the past). Coalescence (fusion)
SEE ALSO
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