Breadcrumb Home > Thesaurus > U Synonyms of undermine Find synonyms for: Verb 1. sabotage, undermine, countermine, counteract, subvert, weaken, disobey usage: destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war" 2. cave, undermine, hollow, hollow out, core out usage: hollow out as if making a cave or opening; "The river was caving the banks" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of undermine (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: occultation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language