fraudator
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
Latin > English (Lewis & Short)
fraudātor: ōris, m. id.,
I a cheat, deceiver, defrauder (rare but class.): creditorum Trebellius et homo diruptus dirutusque, Cic. Phil. 13, 12, 26: fraudatorum et infitiatorum impudentia, id. Fl. 20, 48: beneficiorum, Sen. Ben. 4, 26.