- Definitions|1
- Thesaurus|758
- Abbreviations|0
| imperceptive(adjective, hard, indifferent, unkind, unresponsive) | |
| impersuadable | |
| impersuasible | |
| imperturbable | |
| impervious to(expression, adjective, dead, insensitive, insusceptible) | |
| incapable | |
| incommutable | |
| inconvertible | |
| incurious(adjective, hard, indifferent, unkind, unresponsive) | |
| indefeasible | |
| indurated(adjective, hard, careless, indifferent, cruel) | |
| inert | |
| insensate(noun, adjective, hard, careless, indifferent) | |
| insusceptible of change(expression, idiom) | |
| intransmutable | |
| inured(noun, adjective, hard, careless, indifferent) | |
| invariable | |
| irresponsible(adjective, safe, unaffected, protected, resistant) | |
| irretrievable | |
| irreversible |
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| APA | Smart Define. (2015). unsusceptible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unsusceptible/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "unsusceptible thesaurus" https://smartdefine.org/unsusceptible/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, unsusceptible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unsusceptible/thesaurus/synonyms>. |
| MLA | Smart Define. "unsusceptible thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unsusceptible/thesaurus/synonyms> |