125 entries under unresponsive topic. ×

7
unruffled(adjective, calm, quiet, cool, moderate)
7
unsympathetic(adjective, hard, careless, indifferent, cruel)
6
dull(adjective, calm, tough, slow, relaxed)
6
obtuse(adjective, dull, hard, slow, stupid)
6
wooden(adjective, dull, cool, dead, blank)
5
dense(adjective, dull, slow, stupid)
5
hard-hearted(adjective, calm, indifferent, restrained, detached)
5
inexpressive(adjective, dull, cool, detached, dead)
5
lukewarm(adjective, calm, cool, temper, relaxed)
5
reticent(adjective, cool, restrained, detached, blank)
5
undemonstrative(adjective, calm, cool, restrained, detached)
4
coldhearted(adjective, dull, hard, slow, detached)
4
objective(adjective, calm, tough, indifferent, rational)
4
restrained(adjective, calm, subdued, unemotional)
4
tepid(adjective, calm, temper, cold, negative)
4
unimpassioned(adjective, calm, cool, tough, restrained)
4
untouched(adjective, calm, cold, indifferent, restrained)
3
impervious(adjective, calm, restrained, unconcerned, subdued)
3
inactive(adjective, dull, quiet, cool, weak)
3
supine(adjective, dull, weak, easy, slow)
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APASmart Define. (2015). impassive thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impassive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassive thesaurus" https://smartdefine.org/impassive/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, impassive thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impassive/thesaurus/synonyms>.
MLASmart Define. "impassive thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/impassive/thesaurus/synonyms>