MENDACIOUS : given to or characterized by deception or falsehood or divergence from absolute truth
The newspaper story was mendacious and hurtful.
Indeed, the racist and Malthusian elements in Darwin's work are subjects on which the new secularists are either silent, delicate, or mendacious. —Eugene McCarraher, Commonweal, 15 June 2007
Latin mendac-, mendax, lying
First Known Use: 1616