ἄκακος
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη → The first and best victory is to conquer self.
English (LSJ)
ον,
A unknowing of ill, guileless, A.Pers.663 (lyr.), Pl.Ti. 91d, Ep.Rom.16.18. 2 innocent, simple (cf. εὐήθης), D.47.46, 82; ἄ. ἀνθρώπων τρόπος Anaxil.33. Adv. -κως D.47.50. II unharmed, Sapph.149. 2 unadulterated, POxy.142 (vi A. D.).