Phonological history of English vowels

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The phonological history of the English vowels involves a large number of diachronic sound changes, especially involving phonemic splits and mergers.

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[edit] Tense–lax neutralization

Tense–lax neutralization refers to a neutralization, in a particular phonological context in a particular language, of the normal distinction between tense and lax vowels.

In most varieties of English, this occurs in particular before /ŋ/ and (in rhotic dialects) before coda /r/ (that is, /r/ followed by a consonant or at the end of a word); it also occurs, to a lesser extent, before tautosyllabic /ʃ/ and /g/. Some examples of neutralization of /ɛ/ to /eɪ/ before /ɡ/ are beg, egg, Greg, keg, leg and peg's coming to rhyme with Craig, Hague, plague and vague.

Some varieties (including most American English dialects) have significant vocalic neutralization before intervocalic /r/, as well. See English-language vowel changes before historic r.

[edit] Monophthongs

[edit] Low front vowels

[edit] Low back vowels

[edit] High back vowels

[edit] High front vowels

[edit] Diphthongs

[edit] English-language vowel changes before historic r

[edit] Mergers before intervocalic r

Mergers before intervocalic r are quite widespread in North American English.

[edit] Mergers before historic coda r

Various mergers before historic coda r are very common in English dialects.

[edit] English-language vowel changes before historic l

[edit] Pre-stressed environment schwa deletion

Pre-stressed environment schwa deletion is the deletion of /ə/ from the initial syllable of words when it is preceded by at least one consonant and followed by a stressed syllable occurring in some varieties of English resulting in pronunciations such as:

support — /spɔːrt/

surprise — /spraɪz/

police — /pliːs/

below — /bloʊ/

garage — /grɑːdʒ/

semester — /smɛstɚ/

tonight — /tnaɪt/

surround — /sraʊnd/

supposed — /spoːz(d)/

[edit] Mere–mirror merger

The mere–mirror merger is a process that occurs for some speakers in the Northern United States where /ɚ/ disappears after intervocalic /r/ in a monomorphemic word. As a result, the following words can become homophonous:

  • mirror, mere
  • terror, tear
  • error, air
  • horror, whore

[edit] See also