triphthong
noun /ˈtrɪfθɒŋ/, /ˈtrɪpθɒŋ/
/ˈtrɪfθɔːŋ/, /ˈtrɪpθɔːŋ/
(phonetics- a combination of three vowel sounds or vowel letters, for example the sounds /aɪə/ in fire /faɪə(r)/
compare diphthong, monophthong三合元音;三元音; 三母音 词源mid 16th cent.: from French triphtongue, from tri- ‘three’, on the pattern of diphthong.