| lazy(adjective, dull, weak, feeble) | |
| feeble(adjective, dull, weak) | |
| weak(adjective, dull, feeble) | |
| inactive(adjective, dull, weak, feeble) | |
| lethargic(adjective, dull, weak, feeble) | |
| enervated(verb, adjective, dull, weak, feeble) | |
| impotent(adjective, dull, weak, feeble) | |
| sluggish(adjective, dull, weak, feeble) | |
| dead in the water | |
| feminine | |
| delicate(adjective, dull, weak, feeble) | |
| inert | |
| infirm(adjective, dull, weak, feeble) | |
| mild(adjective, dull, weak, feeble) | |
| apathetic(adjective, dull, weak, feeble) | |
| frail | |
| not good | |
| idle(adjective, dull, weak, feeble) | |
| languid | |
| torpid |
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Vigorous on
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| APA | Smart Define. (2016). vigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/vigorous/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "vigorous thesaurus" https://smartdefine.org/vigorous/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, vigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/vigorous/thesaurus/antonyms>. |
| MLA | Smart Define. "vigorous thesaurus" 1 April 2016. Web. 24 September 2026. <https://smartdefine.org/vigorous/thesaurus/antonyms> |