ἄτρεστος
From LSJ
Aristotle, Nicomachean Ethics, 5.30
English (LSJ)
ον, (τρέω)
A not trembling, fearless, Trag., and Pl.Cra.395c: c. gen., ἄ. μάχας fearless of fight, A.Pr.416 (lyr.); ἄ. ἐν μάχαις S.Aj. 365 (lyr.); ἄ. εὕδειν securely, Id.OT586. Adv. -τως A.Supp.240: neut. pl. ἄτρεστα as Adv., E.Ion1198.