104 entries under unresponsive topic. ×

1
easy-going(adjective, calm, restrained, unconcerned, subdued)
1
flat(adjective, detached, impassive, laid-back)
1
glacial(adjective, detached, impassive, insensitive)
1
going with the flow(expression, adjective, idiom, detached, impassive)
1
imperturbable(adjective, calm, cold, cruel, restrained)
1
laid-back(adjective, calm, restrained, detached, unconcerned)
1
listless(adjective, indifferent, detached, weary, apathetic)
1
lukewarm(adjective, calm, indifferent, restrained, unsympathetic)
1
not influenced(expression, adjective, calm, restrained, unconcerned)
1
not responsive(expression, adjective, detached, impassive)
1
passionless(adjective, detached, impassive, laid-back)
1
phlegmatic(adjective, indifferent, detached, unsympathetic, impassive)
1
proof(adjective, calm, restrained, unconcerned, subdued)
1
quiet(adjective, calm, restrained, detached, subdued)
1
reticent(adjective, detached, impassive, laid-back)
1
rolling with the punches(expression, adjective, idiom, detached, impassive)
1
serene(adjective, calm, indifferent, restrained, unsympathetic)
1
steady(adjective, calm, restrained, unconcerned, subdued)
1
unaltered(adjective, calm, restrained, unconcerned, subdued)
1
unchanged(adjective, calm, restrained, unconcerned, subdued)
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APASmart Define. (2016). hard-hearted thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-hearted/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-hearted thesaurus" https://smartdefine.org/hard-hearted/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, hard-hearted thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-hearted/thesaurus/synonyms>.
MLASmart Define. "hard-hearted thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/hard-hearted/thesaurus/synonyms>