300 entries under weak topic. ×

12
insubstantial(adjective, strong, light, slight)
12
irresolute(adjective, delicate, uncertain, ill)
12
powerless(adjective, hurt, thin, delicate)
12
unsteady(adjective, change, strong, uncertain)
11
enervated(adjective, dull, easy, thin)
10
diseased(adjective, mean, sick, feeble)
10
enfeebled(adjective, thin, delicate, ill)
10
impotent(adjective, hurt, thin, delicate)
10
indisposed(adjective, mean, bad, thin)
10
lame(adjective, hurt, disease, thin)
10
unstable(adjective, change, strong, delicate)
10
unsubstantial(adjective, strong, light, slight)
10
weakly(adjective, adverb, strong, thin)
10
wobbly(adjective, change, mean, bad, strong)
8
crippled(adjective, hurt, disease, feeble)
8
doddering(adjective, thin, delicate, feeble)
8
vacillating(adjective, delicate, sick, unsettled)
7
insecure(adjective, change, strong, delicate)
7
helpless(adjective, hurt, thin, delicate)
7
poor(adjective, light, slight, weakness)
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APASmart Define. (2015). infirm thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/infirm/thesaurus/synonyms
ChicagoSmart Define. 2015. "infirm thesaurus" https://smartdefine.org/infirm/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, infirm thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/infirm/thesaurus/synonyms>.
MLASmart Define. "infirm thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/infirm/thesaurus/synonyms>