113 entries under restrained topic. ×

12
tranquil(adjective, calm, quiet, cool, relaxed)
9
incurious(adjective, calm, hard, cool, relaxed)
9
reserved(adjective, calm, cool, indifferent)
8
collected(adjective, calm, quiet, cool, moderate)
7
quiet(adjective, calm, cool, relaxed)
7
staid(adjective, calm, indifferent, aloof)
7
steady(adjective, calm, secure, fixed)
7
unruffled(adjective, calm, quiet, cool, moderate)
5
distant(adjective, cool, indifferent, detached)
5
hard-hearted(adjective, calm, indifferent, detached)
5
lukewarm(adjective, calm, cool, temper, relaxed)
5
reticent(adjective, cool, detached, blank)
5
undemonstrative(adjective, calm, cool, detached)
4
mild(adjective, quiet, cool, still)
4
remote(adjective, cool, indifferent, detached)
4
tepid(adjective, calm, temper, cold, negative)
4
unimpassioned(adjective, calm, cool, tough)
4
untouched(adjective, calm, cold, indifferent)
3
impervious(adjective, calm, unconcerned, subdued)
3
meek(adjective, patient, unexcitable, resigned)
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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>