jurar
From LSJ
μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
Spanish > Greek
ἀποδίδωμι ὅρκον, βωμαίνω, διόμνυμι, διομνύναι, διόμνυσθαι, διομνύω, ἐνόμνυμαι, ἐπόμνυμι, ἐπομνύναι, κατόμνυμι, κατομνύναι, ὄμνυμι, ὀμνύναι, ὅρκον ἀποδιδόναι, ὁρκωμοτεῖν