αὐτάγρετος
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
ον, (ἀγρέω) poet. for αὐθαίρετος,
A self-chosen, left to one's choice, εἰ γάρ πως εἴη αὐτάγρετα πάντα βροτοῖσι Od.16.148; σοὶ δ' αὐτάγρετόν ἐστι δαήμεναι h.Merc.474. 2 taken by one's own hands or exertions, A.R.4.231. II Act., choosing freely, Semon.1.19, Opp.H.5.588.