Breadcrumb Home > Thesaurus > U Synonyms of untruthful Find synonyms for: Adjective 1. untruthful (vs. truthful), mendacious, dishonest#1, dishonorable usage: not expressing or given to expressing the truth; "the statement given under oath was untruthful"; "an untruthful person" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of untruthful (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: irascible Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language