τὸν αὐτὸν ἔρανον ἀποδοῦναι → pay him back in his own coin, repay him in his own coin, pay someone back in their own coin, pay back in someone's own coin, give tit for tat, pay back in kind
adv.
P. and V. δικαίως, ἐνδίκως, ὀρθῶς, ἁπλῶς, καλῶς, P. ἴσως, ἐπιεικῶς. He won't honestly admit that he is talking nonsense: P. οὐκ ἐθέλει γενναίως ὁμολογεῖν ὅτι οὐδὲν λέγει (Plat., Lach. 196A-B).
