κρυπτήρ
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
English (LSJ)
κρυπτῆρος, ὁ, = κρυπτήριος (convenient for concealing, dungeon), τόποι Sch. Oppian. H. 3.235.
Greek Monolingual
κρυπτήρ, -ῆρος, ὁ (Α) κρύπτω
κρυπτήριος, κατάλληλος για απόκρυψη, για να κρυφτεί κάποιος ή κάτι («κρυπτήρες τόποι», Σχολ. στον Οππ. Αλ.).