II.Mid. to purify oneself from sins of negligence, id=Plat.; ἀφοσιοῦσθαι τῆι θεῶι to make expiatory offerings to the goddess, Hdt.
2.c. acc. rei, to acquit oneself of an obligation, ἀποσιοῦσθαι τὴν ἐξόρκωσιν to quit oneself of one's oath, id=Hdt.; ἀπ. λόγιον quitting oneself of the orders of an oracle, id=Hdt.