| uncomplacent | |
| unkempt | |
| unquiet | |
| unsystematic | |
| untidy | |
| unwelcoming | |
| vexatious | |
| worried | |
| worrisome | |
| slipshod |
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| APA | Smart Define. (2016). smug thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/smug/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "smug thesaurus" https://smartdefine.org/smug/thesaurus/antonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, smug thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/smug/thesaurus/antonyms>. |
| MLA | Smart Define. "smug thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/smug/thesaurus/antonyms> |