96 entries under decline topic. ×

1
faint(verb, reduce, fail, halt)
1
fall apart(expression, weaken, degenerate, degrade)
1
flag(verb, fail, lower, weaken)
1
give way(verb, expression, reduce, fail)
1
go downhill(expression, weaken, degenerate, degrade)
1
go to pieces(expression, idiom, weaken, degenerate)
1
go to pot(expression, idiom, weaken, degenerate)
1
go to the dogs(expression, idiom, weaken, degenerate)
1
halt(verb, stop, reduce, restrain)
1
hit the skids(expression, idiom, weaken, degenerate)
1
languish(verb, fail, lower, weaken)
1
lapse(weaken, degenerate, deteriorate, decay)
1
limp(verb, reduce, fail, halt)
1
lose it(expression, weaken, degenerate, degrade)
1
lose quality(expression, weaken, degenerate, degrade)
1
lose spirit(verb, expression, reduce, fail)
1
minimize(verb, reduce, fail, halt)
1
regress(weaken, degenerate, deteriorate, degrade)
1
relapse(verb, reduce, fail, halt)
1
relax(verb, reduce, fail, halt)
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APASmart Define. (2015). undermine thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undermine/thesaurus/synonyms
ChicagoSmart Define. 2015. "undermine thesaurus" https://smartdefine.org/undermine/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, undermine thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undermine/thesaurus/synonyms>.
MLASmart Define. "undermine thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/undermine/thesaurus/synonyms>