ε1797Ἐξομόσασθαι
to deny on oath
Those who promised to bear witness for certain people in a lawcourt, if afterwards they might not wish to bear witness against them, used to swear that they knew nothing. And this is 'to deny on oath'.
Ἐξομόσασθαι· οἱ μαρτυρήσειν τισὶν ἐν δικαστηρίῳ ὑπισχνούμενοι, εἰ μετὰ ταῦτα μὴ βούλοιντο καταμαρτυρεῖν, ὤμνυον μηδὲν ἐπίστασθαι. καὶ τοῦτό ἐστιν ἐξομόσασθαι.