diph·thong·ize /ˈdɪfˌθɔŋˌaɪz, ˈdɪp-/
(vt.)雙重母音化,發音成雙重母音
Diph·thong·ize v. t. & i. To change into a diphthong, as by affixing another vowel to a simple vowel. “The diphthongized long vowels.”
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diphthongize
v : change from a simple vowel to a diphthong; "This vowel
diphthongized in Germanic" [syn: diphthongise]