| inelastic | |
| inhuman | |
| intemperate | |
| intricate(adjective, complex) | |
| inured | |
| irritating | |
| jagged | |
| jejune | |
| keen | |
| kick-ass | |
| leathery(adjective, hard, durable) | |
| loud-mouthed | |
| loud-voiced | |
| lusty | |
| mannerable | |
| nimble | |
| oppressive | |
| orotund | |
| pebbly | |
| penetrating |
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| APA | Smart Define. (2016). soft thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/soft/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "soft thesaurus" https://smartdefine.org/soft/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, soft thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/soft/thesaurus/antonyms>. |
| MLA | Smart Define. "soft thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/soft/thesaurus/antonyms> |