| incapable(adjective, strong, fit, adequate, helpless) | |
| feeble(strong, fit) | |
| not good | |
| unable(adjective, strong, fit, skill, talent) | |
| awkward | |
| inadequate | |
| dysfunctional | |
| green | |
| fatuous | |
| inefficient(adjective, sound, well, competent, wasteful) | |
| incompetent(adjective, strong, qualified, unable, unskillful) | |
| impotent(adjective, strong, weak, green, competent) | |
| inept(adjective, expert) | |
| amateur | |
| inexpert | |
| unfit | |
| unqualified | |
| unskilled | |
| weak(adjective, firm, powerful, healthy, feeble) | |
| clumsy(adjective, weak, green, inept) |
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| APA | Smart Define. (2015). capable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/capable/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "capable thesaurus" https://smartdefine.org/capable/thesaurus/antonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, capable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/capable/thesaurus/antonyms>. |
| MLA | Smart Define. "capable thesaurus" 23 September 2015. Web. 20 September 2026. <https://smartdefine.org/capable/thesaurus/antonyms> |