Vowel
来自Big Physics
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Middle English: from Old French vouel, from Latin vocalis (littera) ‘vocal (letter)’.
wiktionary
Borrowed into Middle English from Old French vouel (French voyelle), from Latin vōcālis(“voiced”), a semantic loan of Koine Greek φωνῆεν(phōnêen). Doublet of vocal.
etymonline
vowel (n.)
c. 1300, from Old French voieul (Modern French voyelle), from Latin vocalis, in littera vocalis, literally "vocal letter," from vox (genitive vocis) "voice," from PIE root *wekw- "to speak." Vowel shift in reference to the pronunciation change between Middle and Modern English is attested from 1909. The English record-holder for most consecutive vowels in a word is queueing.
