The story
From penta- + -phthong, by analogy with diphthong, triphthong.
Etymology from Wiktionary, CC BY-SA 4.0.
pentaphthong
Today it means: A sequence of five vowels pronounced as, or almost as, a single syllable. Full definition →
Today it means: A sequence of five vowels pronounced as, or almost as, a single syllable. Full definition →
From penta- + -phthong, by analogy with diphthong, triphthong.
Etymology from Wiktionary, CC BY-SA 4.0.