- a complex vowel sound involving three continuous vowel sounds in one syllable (Ex.: fire, as in the British pronunciation, IPA [fa?])
- loosely a trigraph
Origin of triphthongtri- + (di)phthong
Origin of triphthongtri- (di)phthong
From the Ancient Greek Ï„ÏÎ¯Ï†Î¸Î¿Î³Î³Î¿Ï‚ (triphthongos, “triphthong", adjectivally “having three voices"), from Ï„ÏÎ¯Î± (tria, “three") + Ï†Î¸ÏŒÎ³Î³Î¿Ï‚ (phthongos, “sound").