ἐνέγγυον

From LSJ

κρῖναι δὲ λόγῳ πολύδηριν ἔλεγχον ἐξ ἐμέθεν ῥηθέντα → judge by reason the too much contested argument which has been given by me

Source

Spanish (DGE)

-ου, τό
seguridad, prueba, garantía πολλὰ γὰρ ἐνέγγυα τῆς οἰκείας δυνάμεως δεδωκώς Thdt.M.80.1496D.