mendacious *dishonest, lying, untruthful, deceitful
Analogous words: *false, wrong: prevaricating, equivocating, paltering, fibbing (see LIE vb)
Antonyms: veracious
Contrasted words: *reliable, dependable, trustworthy: honest, *upright, just, scrupulous, conscientious, honorable

New Dictionary of Synonyms. 2014.


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  • Mendacious — Men*da cious, a. [L. mendax, acis, lying, cf. mentiri to lie.] 1. Given to deception or falsehood; lying; as, a mendacious person. [1913 Webster] 2. False; counterfeit; containing falsehood; as, a mendacious statement. [1913 Webster] {Men*da… …   The Collaborative International Dictionary of English

  • mendacious — I adjective artful, clever in deception, collusive, concocted, counterfeit, covinous, cunning, deceitful, deceiving, devoid of truth, dishonest, distorted, embroidered, fabricated, false, falsified, feigned, fictitious, fraudulent, given to lying …   Law dictionary

  • mendacious — (adj.) 1610s, from M.Fr. mendacieux, from L. mendacium a lie, untruth, falsehood, fiction, from mendax (gen. mendacis) lying, deceitful, from menda fault, defect, carelessness in writing, from PIE root *mend physical defect, fault (see AMEND (Cf …   Etymology dictionary

  • mendacious — [adj] dishonest deceitful, deceptive, duplicitous, equivocating, erroneous, fallacious, false, fibbing, fraudulent, insincere, lying, paltering, perfidious, perjured, prevaricating, shifty, spurious, untrue, untruthful, wrong; concept 267 Ant.… …   New thesaurus

  • mendacious — ► ADJECTIVE ▪ untruthful. DERIVATIVES mendaciously adverb mendacity noun. ORIGIN Latin mendax lying …   English terms dictionary

  • mendacious — [men dā′shəs] adj. [< L mendax (gen. mendacis) < IE base * mend , a flaw > L emendare,EMEND] not truthful; lying or false mendaciously adv. mendaciousness n …   English World dictionary

  • mendacious — mendaciously, adv. mendaciousness, n. /men day sheuhs/, adj. 1. telling lies, esp. habitually; dishonest; lying; untruthful: a mendacious person. 2. false or untrue: a mendacious report. [1610 20; < L mendaci (see MENDACITY) + OUS] Ant. 1, 2.… …   Universalium

  • mendacious — [[t]mende͟ɪʃəs[/t]] ADJ GRADED A mendacious person is someone who tells lies. A mendacious statement is one that is a lie. [FORMAL] …   English dictionary

  • mendacious — adjective Etymology: Latin mendac , mendax more at amend Date: 1616 given to or characterized by deception or falsehood or divergence from absolute truth < mendacious tales of his adventures > Synonyms: see dishonest • mendaciously adverb •… …   New Collegiate Dictionary

  • mendacious — men|da|cious [menˈdeıʃəs] adj formal [Date: 1600 1700; : Latin; Origin: mendax] not truthful ▪ mendacious propaganda >mendaciously adv …   Dictionary of contemporary English