κρυφός
From LSJ
τὸ κακὸν δοκεῖν ποτ' ἐσθλὸν τῷδ' ἔμμεν' ὅτῳ φρένας θεὸς ἄγει πρὸς ἄταν → evil appears as good to him whose mind the god is leading to destruction (Sophocles, Antigone 622f.)
English (LSJ)
ὁ,
A = κρυφιότης, Emp.27.3 (dub.); κρυφὸν θέμεν to throw a cloud over... Pi.O.2.97 (κρύφιον codd.). II lurking-place, LXX 1 Ma.2.36, 1.53. (On the accent v. Hdn.Gr.1.225.)