Dictionary

diphthongize

verb diph·thong·ize \ˈdif-ˌthŋ-ˌīz, ˈdip-\
diph·thong·izeddiph·thong·iz·ing

Definition of DIPHTHONGIZE

intransitive verb
of a simple vowel
:  to change into a diphthong
transitive verb
:  to pronounce as a diphthong
diph·thong·i·za·tion \(ˌ)dif-ˌthŋ-ə-ˈzā-shən, (ˌ)dip-\ noun
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First Known Use of DIPHTHONGIZE

1867

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