ἄφοβος · aphobos — LSJ
without fear, and so:
fearless, intrepid, Pi. I. 5(4).40, S. OC 1325, etc.; πρὸς ἐρημίαν, περὶ τοῦ μέλλοντος, Plu. Lyc. 16, Galb. 23: c. gen., having no fear of, τῶν ἀρχόντων D.Chr. 2.52; τὸ ἄφοβον, = ἀφοβία, Pl. La. 197b. Adv. -βως X. Hier. 7.10, Pl. Lg. 682c, PTeb. 24.74 (ii B. C.).
causing no fear, free from fear, A. Pr. 902; λόγος οὐκ ἄ. εἰπεῖν Pl. Lg. 797a.
ἄ. θῆρες, in S. Aj. 366, is an oxymoron, beasts which fear not men or which no one fears, tame beasts, cattle.