II. mostly, swear in the negative, “ἐξομῇ τὸ μὴ εἰδέναι;” S.Ant.535; “μαρτυρεῖν ἢ ἐξομνύειν” D.29.20:— mostly in Med., aor. ἐξωμοσάμην, deny or disown upon oath, swear formally that one does not know a thing, abjure, “τὰς διαβολάς” Id.57.36; “ἃ μὲν οἶδεν ἐξόμνυσθαι” Is.9.19: abs., ib.18, Pl.Lg.949a, etc.; “οὐκ ἂν ἐξομόσαιτο μὴ οὐκ εἰδέναι” D.57.59, cf. PHal.1.230 (iii B. C.); forswear, renounce, “συγγένειαν ἐξόμνυσθαι” LXX 4 Ma.4.26, 10.3.
2. decline or refuse an office by an oath that one has not means or health to perform it, “ἐξομόσασθαι τὴν πρεσβείαν” Aeschin.2.94, cf. D.19.124; [τὴν ἀρχήν] Arist.Pol.1297a20, Plu.Marc.6, 12, cf. Thphr.Char.24.5.
III. later, simply, swear, make affidavit, PFlor.32A12 (iii A. D.).