| hazardous | |
| hesitant | |
| indecisive | |
| jarring(adjective, smooth, jolting) | |
| lank | |
| lax | |
| listless | |
| loosened | |
| mercurial | |
| mild(adjective, strong, cool, agitated) | |
| mutable | |
| obscure(adjective, weak, uncertain) | |
| pedant | |
| porous | |
| pulpy | |
| skeptical | |
| slender(adjective, strong, fat) | |
| soften | |
| spineless | |
| spiritless |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/firm/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/firm/thesaurus/antonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/firm/thesaurus/antonyms> |