130 entries under feeble topic. ×

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hesitant(adjective, uncertain, shaky, sluggish)
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lackadaisical(adjective, uncertain, shaky, hesitant)
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languorous(adjective, uncertain, shaky, hesitant)
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powerless(adjective, uncertain, frail, puny)
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scrawny(adjective, weak, uncertain, frail)
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shatterable(adjective, weak, thin, delicate)
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sluggish(adjective, uncertain, shaky, hesitant)
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supine(adjective, uncertain, shaky, hesitant)
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underdeveloped(weak, tiny)
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vulnerable(adjective, weak, thin, delicate)
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APASmart Define. (2016). unsubstantial thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsubstantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsubstantial thesaurus" https://smartdefine.org/unsubstantial/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unsubstantial thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsubstantial/thesaurus/synonyms>.
MLASmart Define. "unsubstantial thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/unsubstantial/thesaurus/synonyms>