7 entries under weaken topic. ×

4
sap(noun, verb, help, boost)
3
undermine(verb, support, fix, reduce, destroy)
2
break(verb, cause, agree, continue)
1
attenuate
1
dilute(verb, thinner)
1
relapse(verb, rise, improve, deteriorate)
1
undercut
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APASmart Define. (2016). strengthen thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/strengthen/thesaurus/antonyms
ChicagoSmart Define. 2016. "strengthen thesaurus" https://smartdefine.org/strengthen/thesaurus/antonyms (accessed October 1, 2026).
HarvardSmart Define 2016, strengthen thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/strengthen/thesaurus/antonyms>.
MLASmart Define. "strengthen thesaurus" 3 March 2016. Web. 1 October 2026. <https://smartdefine.org/strengthen/thesaurus/antonyms>