ωφελήσιμος
From LSJ
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
-ον, Α
ωφέλιμος, χρήσιμος («λόγον... ἡδύν, ὠφελήσιμον», Αριστοφ.).
[ΕΤΥΜΟΛ. < ὠφελῶ + κατάλ. -ήσιμος (πρβλ. βοηθήσιμος)].
