ἐπιορκεῖν
From LSJ
Greek > English (Woodhouse Verbs Reversed)
(see also ἐπιορκέω): be false to one's oath, forswear oneself, go back on one's word, swear falsely
(see also ἐπιορκέω): be false to one's oath, forswear oneself, go back on one's word, swear falsely