| jejune | |
| ridiculous(adjective, stupid, funny) | |
| absurd(adjective, senseless, ridiculous) | |
| idiotic(adjective, reasonable, smart, foolish, unsound) | |
| anesthetic | |
| psycho | |
| rash(adjective, reasonable) | |
| unaware | |
| uninhibited | |
| unintelligent(adjective, foolish, unsound) | |
| unsound(adjective, foolish) | |
| wacky | |
| whimsical(adjective, fanciful, playful) | |
| imprudent(adjective, kind, prudent) | |
| irrational(adjective, sound, foolish, rational, senseless) | |
| numb | |
| reckless | |
| unwise(adjective, foolish, prudent, unsound) | |
| asleep | |
| balmy(adjective, violent, insane) |
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| APA | Smart Define. (2016). sensible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sensible/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "sensible thesaurus" https://smartdefine.org/sensible/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, sensible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sensible/thesaurus/antonyms>. |
| MLA | Smart Define. "sensible thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/sensible/thesaurus/antonyms> |