(grammar) change from a simple vowel to a diphthong (also diphthongise)

English - English

Definition of (grammar) change from a simple vowel to a diphthong (also diphthongise) in English English dictionary

{f} diphthongize

Hyphenation

(grammar) change from a sim·ple vow·el to a diph·thong (also diphthongise)