διάμεμπτος

From LSJ

οἱ τοῖς πέλας ἐπιβουλεύοντες, λανθάνουσι πολλὰκις ὑφ' ἑτέρων τοῦτ' αὐτὸ πάσχοντες → when people plot against their neighbours, they fall victim to the same sort of plot themselves

Source

Spanish (DGE)

-ον
irreprochable, γόγγρος ... πρὸς ἐκκρίσεις δ. Orib.2.58.45.