Versprecher
From LSJ
τὸ γὰρ πράττειν τοῦ λέγειν καὶ χειροτονεῖν ὕστερον ὂν τῇ τάξει, πρότερον τῇ δυνάμει καὶ κρεῖττόν ἐστιν (Demosthenes 3.15) → for action, even though posterior in the order of events to speaking and voting, is prior in importance and superior
German > Latin
Versprecher, promissor. – sponsor (der Angelober), Versprechung, s. Versprechen, das.