| feeble(adjective, dull) | |
| obscure(adjective, dull) | |
| soft(adjective, dull) | |
| subdued(adjective, dull) | |
| ambiguous(adjective, dull) | |
| apathetic(adjective, dull) | |
| dispirited(adjective, dull) | |
| dull | |
| indistinct(adjective, dull) | |
| lethargic(adjective, dull) | |
| lifeless(adjective, dull) | |
| tasteful(adjective, dull) | |
| uncertain(adjective, dull) | |
| unclear(adjective, dull) | |
| vague(adjective, dull) |
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| APA | Smart Define. (2016). bold thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/bold/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "bold thesaurus" https://smartdefine.org/bold/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, bold thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/bold/thesaurus/antonyms>. |
| MLA | Smart Define. "bold thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/bold/thesaurus/antonyms> |