άειλος

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

Greek Monolingual

ἄειλος, -ον (Α)
αυτός που δεν θερμαίνεται από τον ήλιο, ο ανήλιος.
[ΕΤΥΜΟΛΟΓΙΑ < ἀ- στερητ. + εἵλη (= η θερμότητα του ήλιου)].