deny on oath: P. and V. ἀπομνύναι, ἐξομνύναι (or mid.).
renounce, give up: P. and V. ἀπειπεῖν, ἀνιέναι (acc. or gen.), V. ἀπαυδᾶν; see renounce.
forswear oneself, swear falsely, verb intransitive: Ar. and P. ἐπιορκεῖν.