| confident | |
| definite(adjective, clear, exact, certain) | |
| certain(adjective, counterfeit, uncertain) | |
| explicit(adjective, false, uncertain, specific, unambiguous) | |
| distinct(adjective, obscure, certain, uncertain) | |
| decided | |
| decisive(adjective, definite) | |
| firm(adjective, weak, obscure, uncertain, definite) | |
| sure(adjective, certain, definite, doubtful, unsure) | |
| unmistakable(adjective, obscure, certain, uncertain, definite) | |
| express(adjective, dull, certain, uncertain, precise) | |
| famous | |
| limited(adjective, free, certain, unrestricted) | |
| obvious(adjective, apparent, understandable) | |
| plain | |
| specific(adjective, obscure, uncertain, vague, particular) | |
| straightforward(adjective, uncertain) | |
| unambiguous(adjective, vague) | |
| evident(adjective, clear, apparent) | |
| bounded(adjective, certain) |
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| APA | Smart Define. (2015). indefinite thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/indefinite/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "indefinite thesaurus" https://smartdefine.org/indefinite/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, indefinite thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/indefinite/thesaurus/antonyms>. |
| MLA | Smart Define. "indefinite thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/indefinite/thesaurus/antonyms> |