ἄφωνος
Etym. φωνή
1. "voiceless, speechless, dumb, silent", Theogn., Hdt., Dem.: c. gen., ἄφωνος ἀρᾶς "unable to utter" a curse, Soph.:—adv. -νως, "without speaking", id=Dem.; neut. pl. as adv., Aesch.
2. ἄφωνα (sc. γράμματα), "consonants", opp. to φωνοῦντα or φωνήεντα (vowels), Eur., Plat.