triphthong

/หˆtษนษชfฮธษ’ล‹(ษก)/

IPA: /T R IH1 P TH AO0 NG/

noun
  1. 1

    A monosyllabic vowel combination usually involving a quick but smooth movement from one vowel to another that passes over a third one.

Source: https://en.wiktionary.org/wiki/triphthong