1803, "representing vocal sounds," from Modern Latin phoneticus (Zoega, 1797), from Greek phōnētikos "vocal," from phōnētos "to be spoken, utterable," verbal adjective of phōnein "to speak clearly, utter," from phōnē "sound, voice," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)). Meaning "relating or pertaining to the human voice as used in speech" is by 1861. Related: Phonetical.
<a href="https://www.etymonline.com/word/etic">Etymology of etic by etymonline</a>
Harper, D. (n.d.). Etymology of etic. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/etic