ἐξόμνυμι
ἐξόμνυμι
and -ύω
fut. ἐξομοῦμαι
aor1 ἐξώμοσα
to swear in excuse, Dem.: to swear in the negative, ἐξ. τὸ μὴ εἰδέναι Soph.:—mostly in Mid., to deny or disown upon oath, swear formally that one does not know a thing, Dem., etc.
to decline an office by oath that one cannot perform it, Aeschin., etc.