Synonyms for UNDERMINING: erosion, corrosion, waste, decomposition, attrition, breakdown, decay, disintegration; Antonyms of UNDERMINING: increase, gain, buildup, helping, healing, curing, rehabilitating, remedying Find 86 different ways to say UNDERMINE, along with antonyms, related words, and example sentences at Thesaurus.com. Need a sharper word for undermine? See 100 clear synonyms with shades of meaning, from weaken and sabotage to erode, undercut, and impair. Find 3,035 synonyms for undermining and other similar words that you can use instead based on 29 separate contexts from our thesaurus. Subversion, sabotage, wrecking, destruction. Full list of synonyms for Undermining is here. Some common synonyms of undermine are cripple, debilitate, disable, enfeeble, sap, and weaken. While all these words mean to lose or cause to lose strength or vigor, undermine and sap suggest a weakening by something working surreptitiously and insidiously. Synonyms for undermining — formal, informal, and literary alternatives: The act of weakening or damaging something, especially someone's position of power or authority. Find 3,255 synonyms for undermine and other similar words that you can use instead based on 20 separate contexts from our thesaurus. Find 1 522 synonyms for Undermining to improve your writing and expand your vocabulary. Synonyms for UNDERMINING: sabotage, subversion, subverting, sabotaging, weakening, impairing, subverting, sabotaging, sapping, threatening, wrecking, thwarting, unnerving, undoing; Antonyms for UNDERMINING: strengthening.