diphtongaison

la diphtongaison
A feminine noun is used with feminine articles and adjectives (e.g., la dame, la lune).
feminine noun
a. diphthongization
Certaines monophtongues en anglais ont subi une diphtongaison lors du Grand Changement Vocalique.Certain monophthongs in English underwent diphthongization during the Great Vowel Shift.
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