/ Thesaurus / M Synonyms of mendaciously Find synonyms for: Adverb1. mendaciously, untruthfullyusage: in a mendacious and untruthful manner; "I told him, quite untruthfully, that I had just returned from leave"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abdicate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language