Definition of "monophthongal" []

• Of or pertaining to a monophthong. (adjective)
• Pronounced as a single vowel sound; said especially of a vowel that is otherwise normally pronounced as a diphthong. (adjective)

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• "The modern monophthongal vowels come first, with the derived forms interspersed according to their form: first added i, then iotized, then iotized with added i."