παρορκέω
From LSJ
μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
English (LSJ)
forswear oneself, Philostr.VA5.35, App.Gall. 19.
German (Pape)
[Seite 527] eidbrüchig, meineidig sein, werden, Sp., wie Schol. Il. 3, 279; Philostr.
Greek (Liddell-Scott)
παρορκέω: ἐπιορκῶ, γίνομαι ἐπίορκος, Φιλόστρ. 219, Ἀππ. παρὰ Σουΐδ.