128 entries under unresponsive topic. ×

14
callous(noun, adjective, calm, bad, cold)
11
indifferent(adjective, calm, restrained, detached, apathetic)
11
insensitive(noun, adjective, bad, cold, detached)
10
proof(adjective, calm, resist, restrained, fast)
8
unaffected(adjective, unyielding, unbending, unable)
7
hardened(noun, adjective, set, hard, tough)
6
thick-skinned(noun, adjective, calm, restrained, detached)
6
unfeeling(noun, adjective, bad, cold, indifferent)
6
unsusceptible(noun, adjective, resist, oblivious)
6
untouched(adjective, calm, restrained, subdued, impassive)
5
unmoved(adjective, calm, indifferent, restrained, detached)
4
cool(adjective, calm, indifferent, restrained, detached)
4
hard(adjective, set, tough, firm, solid)
4
impassive(adjective, calm, restrained, unconcerned, subdued)
4
stony(adjective, oblivious, unmoved)
4
unsympathetic(adjective, bad, cold, indifferent, detached)
3
apathetic(adjective, indifferent, detached, distant, unfeeling)
3
cold(adjective, calm, indifferent, restrained, detached)
3
hard-boiled(noun, adjective, calm, bad, cold)
3
hard-hearted(adjective, calm, bad, cold, restrained)
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APASmart Define. (2015). impervious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/impervious/thesaurus/synonyms
ChicagoSmart Define. 2015. "impervious thesaurus" https://smartdefine.org/impervious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, impervious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/impervious/thesaurus/synonyms>.
MLASmart Define. "impervious thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/impervious/thesaurus/synonyms>