| merciless(adjective, indifferent, unfriendly) | |
| passionless | |
| positive | |
| positive-g | |
| premeditated | |
| scatterbrained | |
| senseless(adjective, indifferent, unfriendly) | |
| slow | |
| stolid | |
| thick-skinned(adjective, strong) | |
| thoughtful | |
| unaware(adjective, indifferent, unfriendly) | |
| unconscious(adjective, indifferent, unfriendly) | |
| undemonstrative | |
| unemotional | |
| unfeeling(adjective, indifferent, unfriendly) | |
| unfriendly(adjective, indifferent) | |
| unresponsive(adjective, indifferent, unfriendly) | |
| unsusceptible(adjective, indifferent, unfriendly, susceptible, receptive) | |
| vigorous |
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| APA | Smart Define. (2016). reactive thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/reactive/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "reactive thesaurus" https://smartdefine.org/reactive/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, reactive thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/reactive/thesaurus/antonyms>. |
| MLA | Smart Define. "reactive thesaurus" 28 March 2016. Web. 23 September 2026. <https://smartdefine.org/reactive/thesaurus/antonyms> |