| geriatric | |
| grave | |
| groggy | |
| groveling | |
| gutless | |
| humdrum | |
| idle | |
| impassive | |
| inactive | |
| inanimate | |
| indifferent | |
| inert | |
| insipid | |
| intimidated | |
| irksome | |
| lackadaisical | |
| languishing | |
| languorous | |
| leaden | |
| limp |
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| APA | Smart Define. (2015). pert thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/pert/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "pert thesaurus" https://smartdefine.org/pert/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, pert thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/pert/thesaurus/antonyms>. |
| MLA | Smart Define. "pert thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/pert/thesaurus/antonyms> |