| feeble(adjective, strong, slow, inadequate) | |
| unable(adjective, strong, slow, skill) | |
| ineffective(adjective, strong, slow, inadequate) | |
| incapable(adjective, strong) | |
| basket-case | |
| basket case(expression, strong) | |
| sapless | |
| uncool | |
| wimpy |
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| APA | Smart Define. (2016). able thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/able/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "able thesaurus" https://smartdefine.org/able/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, able thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/able/thesaurus/antonyms>. |
| MLA | Smart Define. "able thesaurus" 14 March 2016. Web. 24 September 2026. <https://smartdefine.org/able/thesaurus/antonyms> |