dissimulator
From LSJ
Μή μοι γένοιθ', ἃ βούλομ', ἀλλ' ἃ συμφέρει → Ne sit mihi, quod cupio, sed quod expedit → nicht was ich will, geschehe mir, doch was mir nützt
Latin > English (Lewis & Short)
dissĭmŭlātor: ōris, m. id.,
I a dissembler, concealer, Sall. C. 5, 4; Quint. 2, 2, 5; Tac. H. 2, 56; Hor. Ep. 1, 9, 9 al.