A.“-ήσω” Il.19.188, Ar.Lys.914, etc., -ήσομαι (κατ-) D.54.40: aor. “ἐπιώρκησα” Id.49.67, inf. “-ορκῆσαι” Hdt. 4.68 (v.l. ἐφ-): pf. “ἐπιώρκηκα” Pl.Lg.948e, X.An.3.1.22, Din.1.47 (ἐπιόρκηκα is v.l. in Hdt.l.c.):—swear falsely, forswear oneself, οὐδ᾽ “ἐπιορκήσω πρὸς δαίμονος” Il.19.188: also, c.acc., of things sworn by, τὰς βασιληΐας ἱστίας ἐπιώρκηκε has sworn falsely by the royal hearth, Hdt.4.68; “θεάς” Din.1.47; [θεούς] Ar.Av.1609, X.An.2.4.7, D.49.67, etc.: mostly abs., Ar.Eq.298,428, Nu.402, Pl.Phlb.65c, etc.; “οὐδὲν ἐφρόντιζ᾽ ἐπιορκῶν” D.21.119: c.acc.cogn., “ἐ. ὅρκους τινί” Id.49.65, cf.Aeschin.1.115; opp. εὐορκέω, Lexap.And.1.98, Cleanth.Stoic.1.131, Chrysipp.ib.2.63, who distinguishes betw. εὐορκεῖν and ἀληθορκεῖν, and betw. ἐπιορκεῖν and ψευδορκεῖν.
ἐπιορκ-έω , also ἐφιορκέω IG22.1126.9 (Delph. Amphict.), OGI 229.69 (Smyrna, iii B.C.), etc.: fut.