13
weaken(verb, reduce)
5
break down(verb, expression, phrasal verb, reduce, destroy)
5
discourage(verb, reduce, destroy, halt, slow)
4
demoralize(verb, calm, order, help)
4
sap(noun, verb, help, boost, weaken)
4
contract
4
enervate(verb, help, invigorate, tire)
4
soften(verb, upset, reduce, destroy, halt)
3
destroy(verb, reduce, halt, slow)
3
dishearten(verb, reduce, destroy, halt, slow)
3
cripple(verb, help, aid, disable, lame)
3
damage(noun, fix, clean, repair)
3
debilitate(verb, help, aid, incapacitate)
3
emasculate
3
enfeeble(verb, help, weak)
3
exhaust(noun, help)
3
fade(verb, rise, extend, grow, lose)
3
hurt(verb, reduce, destroy, halt, slow)
3
lessen(verb, increase, reduce, destroy, halt)
3
reduce(verb, destroy, raise, halt, extend)
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APASmart Define. (2016). strengthen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/strengthen/thesaurus/antonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/strengthen/thesaurus/antonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 27 September 2026. <https://smartdefine.org/strengthen/thesaurus/antonyms>