vowelyoudaoicibaDictYouDict
vowel: [14] A vowel is etymologically a ‘vocal’ sound – that is, one made by vibrating the vocal chords. The word comes via Old French vouel from Latin vōcālis. This was short for littera vōcālis ‘vocal letter, letter that sounds’, sonus vōcālis ‘vocal sound’, etc. Vōcālis (source of English vocal) was derived from vōx ‘voice’ (source of English voice).
=> voice
phonetic (adj.)youdaoicibaDictYouDict
"representing vocal sounds," 1803, from Modern Latin phoneticus (1797), from Greek phonetikos "vocal," from phonetos "to be spoken, utterable," verbal adjective of phonein "to speak clearly, utter," from phone "sound, voice," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)).
synthesizer (v.)youdaoicibaDictYouDict
1869, agent noun from synthesize. As a type of instrument for generating musical or vocal sounds from 1909; the electronic version is from 1950s.
twang (n.)youdaoicibaDictYouDict
1550s, of imitative origin. Originally the sound of plucked bows and strings; extension to "a nasal vocal sound" is first recorded 1660s. The verb is first attested 1540s. Related: Twanged; twanging.