Lexical Definition

‎ἄφωνος‎ áphōnos (af'-o-nos) mute ^G:A
from ‎Α‎ (as a negative particle) and ‎φωνή‎

dumb, without signification.

• voiceless, i.e. mute (by nature or choice)
• figuratively, unmeaning

Abbott-Smith

ἄφωνος, -ον (φωνή), [in LXX: Is 53:7 (אלם ni.), Wi 4:19, II Mac 3:29*;]
dumb, speechless: Ac 8:32(LXX); of idols (MM, s.v.), I Co 12:2; of beasts, II Pe 2:19; τοσαῦτα γένη φωνῶν καὶ οὐδὲν ἄ.—so many kinds of voices and none voiceless, i.e. without signification, unintelligible: I Co 14:10.†

Abbott-Smith References

Liddell-Scott-Jones

ἄφωνος-ος, ον,

(φωνή) voiceless, dumb, [Refs 6th c.BC+]; stronger than ἄναυδος (which see), [NT+5th c.BC+]; unable to speak, of a child, [Refs 7th c.BC+] unable to utter it, [Refs 5th c.BC+]. adverb -νως[Refs]: neuter plural as adverb, ἄφωνοςα σημανοῦσιν.. ὡς.. [Refs 4th c.BC+]

__2 with a poor voice, τραγῳδός[Refs 2nd c.BC+]
__3 intestate, [Refs]
__4 ἄφωνοςα (i.e. γράμματα, στοιχεῖα) consonants, ἄ. καὶ φωνοῦντα (perhaps ἄ. φωνήεντα) [Refs 5th c.BC+]: but especially of mutes, τὰ ἄφθογγα καὶ ἄ.[Refs]; opposed to ἡμίφωνα, [Refs 4th c.BC+]

_{LSJ Scripture Refs: 1Cor.12.2}