ἐπιορκ-έω,
also ἐφιορκέω [[“IG” 22.1126.9 (Delph. Amphict.), “OGI” 229.69 (Smyrna, 3rd c.BC)] Refs 3rd c.BC+], etc.: future -ήσω [[8th c.BC: Ilias Homerus Epicus “Illiad” 19.188, Ar. “Lys.” 914, etc., -ήσομαι (κατ-) D. 54.40 ] Refs 8th c.BC+]: aorist ἐπιώρκησα [[[prev. author] 49.67 ] Refs], infinitive -ορκῆσαι [[5th c.BC: Herodotus Historicus 4.68 (variant{ἐφ-})] Refs 5th c.BC+]: perfect ἐπιώρκηκα [[5th-6th c.BC: Plato Philosophus “Leges” 948e, X. “An.” 3.1.22, Din. 1.47 (ἐπιόρκηκα is variant in Hdt.[same place])] Refs]:—swear falsely, forswear oneself, οὐδ᾽ ἐπιορκήσω πρὸς δαίμονος 8th c.BC: Ilias Homerus Epicus “Illiad” 19.188: also, c.accusative, of things sworn by, τὰς βασιληΐας ἱστίας ἐπιώρκηκε has sworn falsely by the royal hearth, [[ 5th c.BC: Herodotus Historicus 4.68; θεάς 4th-3rd c.BC: Dinarchus Orator 1.47 ] Refs 5th c.BC+]; [θεούς] [[ Ar. “Av.” 1609, X. “An.” 2.4.7, D. 49.67, etc.: mostly _absolutely_, Ar. “Eq.” 298, 428, “Nu.” 402, Pl. “Phlb.” 65c, etc.; οὐδὲν ἐφρόντιζ᾽ ἐπιορκῶν 4th c.BC: Demosthenes Orator 21.119: c._accusative_ _cognate_, ἐ. ὅρκους τινί [prev. author] 49.65, cf. Aeschin. 1.115 ] Refs 4th c.BC+]; opposed to εὐορκέω, Legal cited in [[ And. 1.98, Cleanth.Stoic. 1.131, Chrysipp.[prev. work] 2.63, who distinguishes between εὐορκεῖν and ἀληθορκεῖν, and between ἐπιορκεῖν and ψευδορκεῖν. ] Refs]
__II. simply, ={ὄμνυμι}, swear, [[ Sol. cited in Lys. 10.17. ] Refs]