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[men-dey-shuh s] /mɛnˈdeɪ ʃəs/
telling lies, especially habitually; dishonest; lying; untruthful:
a mendacious person.
false or untrue:
a mendacious report.
Origin of mendacious
1610-20; < Latin mendāci- (see mendacity) + -ous
Related forms
mendaciously, adverb
mendaciousness, noun
unmendacious, adjective
unmendaciously, adverb
1, 2. veracious. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for mendacious
Contemporary Examples
Historical Examples
  • As long as we have that state of things, we shall have wars and secret and mendacious diplomacy.

  • Bein' a woman, you're too feeble-witted for reason, too mendacious for trooth.'

    Faro Nell and Her Friends Alfred Henry Lewis
  • Like every artist of the mendacious, he was quick for those little deeds that would give his lies a look of righteous integrity.

    The President Alfred Henry Lewis
  • With this mendacious explanation Gustavus was forced to be content.

  • Everybody had eventually accepted that narrative as being accurate, but Mathieu now felt that it was mendacious.

    Fruitfulness Emile Zola
Word Origin and History for 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.

Online Etymology Dictionary, © 2010 Douglas Harper
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