ἐνέγγυον

From LSJ

οὐκ ἔστιν οὐδείς, οὐδ' ὁ Μυσῶν ἔσχατοςthere is nobody, not even the last of the Mysians | there is nobody, not even the meanest of mankind

Source

Spanish (DGE)

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