7 Metaphors for triphthongs
A proper triphthong is a triphthong in which all the vowels are sounded; as, uoy in buoy.
A triphthong is a coalition of three vowels in one syllable.
Or: "A triphthong is the meeting of three vowels in one syllable.
The only proper triphthong in English is uoy, as in buoy, buoyant, buoyancy; unless uoi in quoit may be considered a parallel instance.
He answers in the words of Murray, Weld, Pond, Smith, Adams, Kirkham, Merchant, Ingersoll, Bacon, Alger, Worcester, and others: "A triphthong is the union of three vowels, pronounced in like manner: as eau in beau, iew in view."
A triphthong is three vowels joined in one syllable; as, eau in beau, iew in view, oeu in manoeuvre.
TRIPHTHONGS BEGINNING WITH O. OEu is a French triphthong, pronounced in English as oo, and occurring in the word manoeuvre, with its several derivatives.