ἑόν

From LSJ

οὐ γὰρ ἂν τό γε πραχθὲν ἀγένητον θείη → since he cannot make what was done as though it had not come to pass

Source

French (Bailly abrégé)

acc. neutre ou masc. de ἑός.

English (Autenrieth)

(σϝός, cf. suus), gen. ἑοῦ, ἑοῖο, ἑῆς: his, her, own; seldom w. art., Il. 23.295, Il. 10.256; strengthened by gen. of αὐτός, ἑοὶ αὐτοῦ θῆτες, his own, Od. 4.643.