7 entries under inadequate topic. ×
| useless(adjective, weak, sensible, useful) | |
| weak(adjective, adequate) | |
| fruitless(adjective, weak, fruitful) | |
| impotent(adjective, strong, weak, competent) | |
| incapable(adjective, strong, weak, fit) | |
| incompetent(adjective, strong, weak, qualified) | |
| inefficient(adjective, weak, sound, competent) |
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| APA | Smart Define. (2015). effective thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/effective/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "effective thesaurus" https://smartdefine.org/effective/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, effective thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/effective/thesaurus/antonyms>. |
| MLA | Smart Define. "effective thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/effective/thesaurus/antonyms> |