ἀεικῶς

From LSJ

μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea

Source

French (Bailly abrégé)

adv.
indignement, honteusement, cruellement.
Étymologie: ἀεικής.