Pentaphthong

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A sequence of five vowels pronounced as, or almost as, a single syllable. rare

    "Fifty-six diphthongal combinations may be made from the eight vowel elements, four of which, though, we find to be necessarily triphthongs, two tetraphthongs, and one a pentaphthong."

Example

More examples

"Fifty-six diphthongal combinations may be made from the eight vowel elements, four of which, though, we find to be necessarily triphthongs, two tetraphthongs, and one a pentaphthong."

Etymology

From penta- + -phthong, by analogy with diphthong, triphthong.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.