6
demoralize(verb, upset, reduce, ruin, harm)
6
drain(verb, reduce, bother, diminish, blow)
6
exhaust(verb, stop, decline, hurt, bother)
6
frustrate(verb, destroy, damage, harm, challenge)
6
invalidate(verb, stop, decline, hurt, reduce)
6
thwart(verb, challenge, weaken, opposition, hindrance)
5
unnerve(verb, upset, strong, disturb, weaken)
5
cave
5
corrupt(verb, decline, shame, disgrace, degenerate)
5
debase(verb, decline, reduce, ruin, fail)
5
deplete(verb, diminish, blow, waste, weaken)
5
depress(verb, upset, decline, reduce, disturb)
5
dull(verb, diminish, disable, dampen)
5
erode(verb, diminish, challenge, weaken, shape)
5
foil(verb, challenge, weaken, hindrance, dent)
5
lessen(verb, dull, decline, reduce, fail)
5
overturn(verb, upset, drop, defeat, destroy)
5
shatter(verb, stop, break, hurt, ruin)
5
soften(verb, dull, decline, fail, halt)
4
blight(verb, break, cut, hurt, ruin)
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APASmart Define. (2015). undermine thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/undermine/thesaurus/synonyms
ChicagoSmart Define. 2015. "undermine thesaurus" https://smartdefine.org/undermine/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, undermine thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/undermine/thesaurus/synonyms>.
MLASmart Define. "undermine thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/undermine/thesaurus/synonyms>