Where does “mendacious” come from?

Mendacious comes from Middle French mendacieux, formed with the Middle French suffix -eux from Latin -ium and Latin -osus, ultimately from Proto-Indo-European -yós.

mendacious (English): Lying, untruthful or dishonest; False or untrue

Definitions

  1. Lying, untruthful or dishonest; False or untrue

Ancestry of “mendacious”, step by step

StepLanguageWordMeaning
1Middle Frenchmendacieuxfalse, especially in a way intending to deceive
2LatinmendāciumA lie, untruth, falsehood, fiction
3Latinmendaxdeceitful, lying, deceptive, untruthful, false,...
4Latin-āxish, -y
5Latin-iumSuffix used to form abstract nouns, sometimes...
6Latin-iusforming adjectives from nouns; nominative neuter...
7Proto-Italic-jōsForms comparative adjectives
8Proto-Indo-European-yósCreates adjectives from noun or verb stems

Words derived from “mendacious

Every word from Proto-Indo-European -yósEvery word from Latin -iumEvery word from Latin -ius