72 entries under restrained topic. ×

14
callous(noun, adjective, calm, bad, cold)
11
indifferent(adjective, calm, detached, apathetic)
10
proof(adjective, calm, resist, fast)
7
unresponsive(adjective, calm, bad, cold, indifferent)
6
thick-skinned(noun, adjective, calm, detached)
6
untouched(adjective, calm, subdued, impassive)
5
unmoved(adjective, calm, indifferent, detached)
4
cool(adjective, calm, indifferent, detached)
4
impassive(adjective, calm, unconcerned, subdued)
3
cold(adjective, calm, indifferent, detached)
3
hard-boiled(noun, adjective, calm, bad, cold)
3
hard-hearted(adjective, calm, bad, cold)
3
unconcerned(adjective, calm, indifferent, detached)
2
aloof(adjective, calm, indifferent, detached)
2
imperturbable(adjective, calm, subdued, impassive)
1
calm(adjective, detached, unconcerned, subdued)
1
casual(adjective, calm, unconcerned, subdued)
1
cold fish(expression, adjective, calm, subdued)
1
dispassionate(adjective, calm, indifferent, detached)
1
easy-going(adjective, calm, unconcerned, subdued)
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APASmart Define. (2015). impervious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impervious/thesaurus/synonyms
ChicagoSmart Define. 2015. "impervious thesaurus" https://smartdefine.org/impervious/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impervious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impervious/thesaurus/synonyms>.
MLASmart Define. "impervious thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impervious/thesaurus/synonyms>