εθελοκωφεύω

From LSJ

ὕδωρ δὲ πίνων οὐδὲν ἂν τέκοι σοφόν → by drinking water you would never create anything great

Source

Greek Monolingual

προσποιούμαι τον κουφό, κάνω πως δεν ακούω.