Criticism of the Israeli occupation is mendacious and evil and must never, ever be seriously considered.
They created well-intentioned rules—which most mendacious lobbyists have found a way to ignore legally.
I think Bush is very conscious of the liberal charge that his administration was mendacious.
1610s, from Middle French mendacieux, from Latin mendacium "a lie, untruth, falsehood, fiction," from mendax (genitive mendacis) "lying, deceitful," from menda "fault, defect, carelessness in writing," from PIE root *mend- "physical defect, fault" (see amend (v.)). The sense evolution of Latin mendax was influenced by mentiri "to speak falsely, lie, deceive." Related: Mendaciously; mendaciousness.