μαχλεύω

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

German (Pape)

geil sein, buhlen, Unzucht treiben mit Einem, Maneth. 4.315.