vocal (adj.)youdaoicibaDictYouDict[vocal 词源字典]
late 14c., "spoken, oral," from Old French vocal (13c.), from Latin vocalis "sounding, sonorous, speaking," as a noun, "a vowel," from vox (genitive vocis) "voice" (see voice (n.)). In reference to music (as opposed to instrumental), first recorded 1580s; meaning "outspoken" first attested 1871. Vocal cords is from 1872; see cord.[vocal etymology, vocal origin, 英语词源]