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In phonology, particularly within historical linguistics, dissimilation is a phenomenon whereby similar consonants or vowels in a word become less similar. In English, dissimilation is particularly common with liquid consonants such as /r/ and /l/ when they occur in a sequence.


Examples


Dropped initial /r/ in /r..r/ sequence (r-Deletion)

When a sound occurs before another in the middle of a word in rhotic dialects of English, the first tends to drop out, as in "" for ''berserk,'' "" for ''surprise,'' "" for ''particular'', and "" for ''governor'' – this does not affect the pronunciation of ''government,'' which has only one , but English ''government'' tends to be pronounced "", dropping out the first n. In English, ''r''-deletion occurs when a syllable is unstressed and may drop out altogether, as in "" for ''deteriorate'' and "" for ''temperature,'' a process called haplology. When the is found in , it may change to . (, ' → ''February,'' which has been explained by
phonotactic Phonotactics (from Ancient Greek "voice, sound" and "having to do with arranging") is a branch of phonology that deals with restrictions in a language on the permissible combinations of phonemes. Phonotactics defines permissible syllable struc ...
factors or alternatively by morphological analogy with more common sequences such as ''January''. '' nucular'', which may have arisen through an analogous process)


Dissimilation of /l..l/ to /r..l/

An example where a relatively old case of phonetic dissimilation has been artificially undone in the spelling is English ''
colonel Colonel (abbreviated as Col., Col or COL) is a senior military officer rank used in many countries. It is also used in some police forces and paramilitary organizations. In the 17th, 18th and 19th centuries, a colonel was typically in charge of ...
'', whose standard pronunciation is (with the r sound) in North-American English, or in RP. It was formerly spelt ''coronel'' and is a borrowing from French ''coronnel'', which arose as a result of dissimilation from Italian ''colonnello''."Pronunciation Note" a
Colonel @ Dictionary.Reference.com


Dissimilation of /r..r/ to /l..r/

* Latin peregrinus > Old French pelegrin (and the Italian pellegrino and Sicilian piḍḍigrinu) which gave rise to the English .


Causes

There are several hypotheses on the cause of dissimilation. According to John Ohala, listeners are confused by sounds with long-distance acoustic effects. In the case of English , rhoticization spreads across much of the word: in rapid speech, many of the vowels may sound as if they had an ''r''. It may be difficult to tell whether a word has one source of rhoticity or two. When there are two, a listener might wrongly interpret one as an acoustic effect of the other, and so mentally filter it out. This factoring out of coarticulatory effects has been experimentally replicated. For example, Greek ''pakhu-'' (παχυ-) "thick" derives from an earlier ''*phakhu-.'' When test subjects are asked to say the ''*phakhu-'' form in casual speech, the aspiration from both consonants pervades both syllables, making the vowels breathy. Listeners hear a single effect, breathy voiced vowels, and attribute it to one rather than both of the consonants, as they assume the breathiness on the other syllable to be a long-distance coarticulatory effect, thus replicating the historical change in the Greek word. If Ohala is correct, one might expect to find dissimilation in other languages with other sounds that frequently cause long-distance effects, such as nasalization and pharyngealization.


Types

Dissimilation, like assimilation, may involve a change in pronunciation relative to a segment that is adjacent to the affected segment or at a distance, and may involve a change relative to a preceding or a following segment. As with assimilation, anticipatory dissimilation is much more common than lag dissimilation, but unlike assimilation, most dissimilation is triggered by ''non''-contiguous segments. Also, while many kinds of assimilation have the character of a
sound law A sound change, in historical linguistics, is a change in the pronunciation of a language. A sound change can involve the replacement of one speech sound (or, more generally, one phonetic feature value) by a different one (called phonetic cha ...
, few dissimilations do; most are in the nature of accidents that befall a particular lexical item.


Anticipatory dissimilation

Anticipatory dissimilation at a distance (by far the most common): * Latin *''medio-diēs'' ("mid-day", i.e. "noon"; also "south") became ''merīdiēs''. Latin ''venēnum'' "poison" >
Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, an ethnic group or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance language *** Regional It ...
''veleno''. This category includes a rare example of a systematic sound law, the dissimilation of aspirates in Greek and Sanskrit known as Grassmann's Law: *''thi-thē-mi'' "I put" (with a reduplicated prefix) > Greek ''tí-thē-mi'' (τίθημι), *''phakhu'' "thick" > Greek ''pakhus'' (παχύς), *''sekhō'' "I have" > *''hekhō'' > Greek ''ékhō'' (ἔχω; cf. future *''hekh-s-ō'' > ''héksō'' ἕξω). Some apparent cases are problematic, as in English "eksetera" for ''
etcetera ''Et Cetera'' ( or (proscribed) , ), abbreviated to ''etc.'', ''etc'', ''et cet.'', ''&c.'' or ''&c'' is a Latin expression that is used in English to mean "and other similar things", or "and so forth". Translated literally from Latin, means 'an ...
'', which may rather be contamination from the numerous forms in ''eks-'' (or a combination of influences), though the common misspelling ''ect''. implies dissimilation. Anticipatory dissimilation from a contiguous segment (very rare): * The change from fricative to stop articulation in a sequence of fricatives may belong here: German ''sechs'' (as evidenced by the spelling, the was previously a fricative). In Sanskrit in any original sequence of two sibilants the first became a stop (often with further developments): root ''vas''- "dress", fut. ''vas-sya''- > ''vatsya''-; *''wiś-s'' "clan" (nom.sg.) > *''viťś > *viṭṣ > viṭ'' (final clusters are simplified); *''wiś-su'' locative pl. > *''viṭṣu > vikṣu''. English ''amphitheater'' is very commonly pronounced ''ampitheater'' (though spelling pronunciation may be either some or all of the story here). Russian конфорка 'stove burner' is from Dutch ''komfoor'' 'brazier'.


Lag dissimilation

Lag dissimilation at a distance (fairly common): * English "purple" is in medieval English as ''purpul'' and ''purpure'' (in medieval French ''porpre'') and comes from classical Latin ''purpura'' = "purple" with dissimilation of to . Latin ''rārus'' "rare" > Italian ''rado''. ''Cardamom'' is commonly pronounced ''cardamon''. In Middle English, in some words ending in -''n'' preceded by a coronal consonant the ''-n'' changed to -''m'': ''seldom, random, venom''. English ''marble'' is ultimately from Latin ''marmor''. Russian февраль 'February' is from Latin ''Februārius''. * In Spanish, interchanges between and are common; for a list, see History of the Spanish language#Interchange of the liquids /l/ and /r/. In Basque, dissimilation is frequent as well. Lag dissimilation from a contiguous segment (very rare): * Latin ''hominem'' ("man", acc.) > Old Spanish ''omne'' > ''omre'' >
Spanish Spanish might refer to: * Items from or related to Spain: **Spaniards are a nation and ethnic group indigenous to Spain **Spanish language, spoken in Spain and many Latin American countries **Spanish cuisine Other places * Spanish, Ontario, Can ...
''hombre'' * Latin ''nomine'' ("name", abl.) > ''nomre'' > Spanish ''nombre'' * English ''chimney'' (standard) > ''chim(b)ley'' (dialectal) *
Proto-Slavic Proto-Slavic (abbreviated PSl., PS.; also called Common Slavic or Common Slavonic) is the unattested, reconstructed proto-language of all Slavic languages. It represents Slavic speech approximately from the 2nd millennium B.C. through the 6th ...
*''svobodà'' "freedom" > Slovak ''sloboda'' (vs.
Czech Czech may refer to: * Anything from or related to the Czech Republic, a country in Europe ** Czech language ** Czechs, the people of the area ** Czech culture ** Czech cuisine * One of three mythical brothers, Lech, Czech, and Rus' Places * Czech ...
''svoboda'') * In
Irish Irish may refer to: Common meanings * Someone or something of, from, or related to: ** Ireland, an island situated off the north-western coast of continental Europe ***Éire, Irish language name for the isle ** Northern Ireland, a constituent unit ...
, many dialects regularly change the sequence to


Paradigmatic dissimilation

When, through sound change, elements of a grammatical paradigm start to conflate in a way that is not easily remedied through re-wording, the forms may dissimilate. For example, in modern Korean the vowels and are merging for many people in the capital Seoul, and concurrently the second-person pronoun 네 'you' is shifting to 니 to avoid confusion with the first-person pronoun 내 'me'. Similarly, it appears that English ''
she She most commonly refers to: *She (pronoun), the third person singular, feminine, nominative case pronoun in modern English. She or S.H.E. may also refer to: Literature and films *'' She: A History of Adventure'', an 1887 novel by H. Rider Hagga ...
,'' historically ''heo'', may have acquired its modern ''sh'' form through dissimilation from ''he'', though it is not clear whether the mechanism was idiosyncratic sound change ( palatalization) of ''heo'', or substitution of ''heo'' with the feminine demonstrative pronoun ''seo''.


See also

*
Assimilation (linguistics) Assimilation is a sound change in which some phonemes (typically consonants or vowels) change to become more similar to other nearby sounds. A common type of phonological process across languages, assimilation can occur either within a word ...


References

{{reflist


Sources

* Crowley, Terry. (1997) ''An Introduction to Historical Linguistics.'' 3rd edition. Oxford University Press.
Vasmer's dictionary

Dissimilation
(''International Encyclopedia of Linguistics'', 2nd ed.) Phonology Sound changes