30 entries under verb topic. ×
| loosen(weaken, soften) | |
| relax | |
| soften | |
| dissolve(weaken, soften) | |
| liquefy(weaken, soften) | |
| melt(weaken, soften) | |
| loosen up(expression, phrasal verb) | |
| weaken | |
| abate | |
| annul | |
| cancel | |
| dilute(weaken, soften) | |
| ease up(expression, phrasal verb) | |
| heat(weaken, soften) | |
| impair | |
| mitigate | |
| modulate | |
| palliate | |
| reduce | |
| relieve |
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| APA | Smart Define. (2015). stiffen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/stiffen/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "stiffen thesaurus" https://smartdefine.org/stiffen/thesaurus/antonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, stiffen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/stiffen/thesaurus/antonyms>. |
| MLA | Smart Define. "stiffen thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/stiffen/thesaurus/antonyms> |