fallācĭlŏquus, a, um, adj. [fallaxloquor],
speaking deceitfully or falsely : fallaciloquae malitiae, Att. ap. Cic. Fin. 4, 25, 68.
fallāciloquus adj. fallax+4 LAC-, speaking deceitfully, false : malitiae, Att. ap. C. ...
An Elementary Latin Dictionary