Webster’s Revised Unabridged Dictionary · 1913
Mendacious
Men·da′cious (mĕn·dā′shŭs), a. [L. mendax, -acis, lying, cf. mentiri to lie.] 1. Given to deception or falsehood; lying; as, a mendacious person.
2. False; counterfeit; containing falsehood; as, a mendacious statement.
— Men·da′cious·ly, adv. — Men·da′cious·ness, n.