#4521. 英語史上の主要な母音変化[sound_change][vowel][phonetics][phonology][diphthong][gvs][r]


 「#3386. 英語史上の主要な子音変化」 ([2018-08-04-1]) の母音版を書いていなかったので,今回は英語史における母音の音変化について,主要なものをまとめたい.
 とはいっても,英語史上の音変化は「#1402. 英語が千年間,母音を強化し子音を弱化してきた理由」 ([2013-02-27-1]) からも示唆されるように,母音変化のほうがずっと種類や規模が著しい.したがって,少数の主な変化にまとめ上げるのも難しい.そこで,Cruttenden (72) に従って,古英語と現代英語の母音体系を比較対照したときに際立つポイントを6点挙げることで,この難題の当面の回答としたい.

 (1) OE rounded front vowels [yː, ʏ] were lost by ME (following even earlier loss of [øː, œ]).
 (2) Vowels in weakly accented final syllables (particularly in suffixes) were elided or obscured to [ə] or [ɪ] in ME or eModE.
 (3) All OE long vowels closed or diphthongised in eModE or soon after.
 (4) Short vowels have remained relatively stable. The principal exception is the splitting of ME [ʊ] into [ʌ] and [ʊ], the latter remaining only in some labial and velar contexts.
 (5) ME [a] was lengthened and retracted before [f,θ,s] in the eighteenth century.
 (6) The loss of post-vocalic [r] in the eighteenth century gave rise to the centring diphthongs /iə,eə,ɔə,ʊə/ (later /ɔə/ had merged with /ɔː/ by 1950 and /eə/ became /ɛː/ by 2000). The pure vowel /ɜː/ arose in the same way and the same disappearance of post-vocalic [r] introduced /ɑː,ɔː/ into new categories of words, e.g. cart, port

 (3) がいわゆる「大母音推移」 (gvs) に関連する変化である,

 ・ Cruttenden, Alan. Gimson's Pronunciation of English. 8th ed. Abingdon: Routledge, 2014.

Referrer (Inside): [2022-09-10-1]

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