| tremulous | |
| uneasy | |
| unself-confident | |
| filthy | |
| sloppy | |
| sloven | |
| slovenly | |
| solicitous | |
| sordid | |
| squalid | |
| suspicious | |
| tacky | |
| tentative | |
| threadbare | |
| timorous | |
| tousled | |
| troubled | |
| tumbled | |
| unaffected | |
| unassertive |
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Power Thesaurus
| APA | Smart Define. (2016). smug thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/smug/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "smug thesaurus" https://smartdefine.org/smug/thesaurus/antonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, smug thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/smug/thesaurus/antonyms>. |
| MLA | Smart Define. "smug thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/smug/thesaurus/antonyms> |