diphthongizev.
/ˈdɪfθɒŋ(ɡ)ʌɪz/, /ˈdɪpθɒŋ(ɡ)ʌɪz/, U.S. /ˈdɪpθɔŋ(ɡ)ˌaɪz/, /ˈdɪfθɔŋ(ɡ)ˌaɪz/, /ˈdɪpθɑŋ(ɡ)ˌaɪz/, /ˈdɪfθɑŋ(ɡ)ˌaɪz/ 1. transitive. To turn into a diphthong.
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the mind > language > linguistics > study of speech sound > speech sound > vowel > furnish with or produce by vowel [verb (transitive)] > diphthongize
diphthong1846
diphthongize1866
1866 G. Stephens Old-Northern Runic Monuments I. i. 52 All sorts of broadenings and thinnings of vowels, diphthongizings [etc.].
1874 H. Sweet Hist. Eng. Sounds 56, ii and uu being diphthongized.
1877–9 Trans. Philol. Soc. 458 In German, original long i was already diphthongized when the orthography began to settle down into its present form.
2. intransitive. To form a diphthong.
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the mind > language > linguistics > study of speech sound > speech sound > vowel > [verb (intransitive)] > form part of diphthong
diphthongize1869
1869 A. J. Ellis On Early Eng. Pronunc. I. i. iii. 196 This second (ɹ) may diphthongise with any preceding vowel.
Derivatives
ˌdiphthongiˈzation n. the changing of a simple vowel into a diphthong.
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the mind > language > linguistics > study of speech sound > speech sound > vowel > [noun] > diphthong > conversion to
diphthongization1874
diphthongation1896
1874 H. Sweet Hist. Eng. Sounds 70 The most prominent feature of our present English is its tendency to diphthongization.
This entry has not yet been fully updated (first published 1896; most recently modified version published online March 2022).
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v.1866