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Origin and history of mendacious

mendacious(adj.)

"given to lying, speaking falsely; having the characteristics of a lie, false, untrue," 1610s, from French mendacieux and directly 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.

also from 1610s

Entries linking to mendacious

amend(v.)

early 13c., amenden, "to free from faults, rectify," from Old French amender "correct, set right, make better, improve" (12c.), from Latin emendare "to correct, free from fault," from ex "out" (see ex-) + menda, mendum "fault, physical blemish; error," from PIE *mend- "physical defect, fault" (source also of Sanskrit minda "physical blemish," Old Irish mennar "stain, blemish," Welsh mann "sign, mark;" Hittite mant- "something harming").

The spelling with a- is unusual but early and also is found in Provençal and Italian. In English, the word has been supplanted in senses of "repair; cure" by its shortened offspring mend (v.). The meaning "to add to legislation" (ostensibly to correct or improve it) is recorded from 1777. Related: Amended; amending.

mendacity(n.)

"tendency or disposition to lie, habitual lying," also "a falsehood, a lie," 1640s, from French mendacité and directly from Late Latin mendacitas "falsehood, mendacity," from Latin mendax "lying; a liar" (see mendacious).

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