65 entries under impassive topic. ×

1
going with the flow(expression, adjective, idiom, detached)
1
hard-boiled(adjective, detached, unresponsive, laid-back)
1
immovable(adjective, cool, detached, blank, sober)
1
in cold blood(expression, adjective, idiom, cool, detached)
1
insensitive(adjective, detached, unresponsive, laid-back)
1
laid-back(adjective, calm, quiet, reasonable, mild)
1
laid back(verb, expression, adjective, phrasal verb, cool)
1
listless(adjective, calm, dull, flat, detached)
1
marble(adjective, detached, unresponsive, laid-back)
1
matter-of-fact(adjective, calm, cool, detached, unfriendly)
1
nonemotional(adjective, cool, detached, blank, sober)
1
not responsive(expression, adjective, detached, unresponsive)
1
nowhere(adjective, cool, detached, blank, sober)
1
obdurate(adjective, detached, unresponsive, laid-back)
1
poker-faced(adjective, detached, unresponsive, dispassionate)
1
poker face(expression, adjective, cool, detached, blank)
1
rolling with the punches(expression, adjective, idiom, detached)
1
stony-eyed(adjective, cool, detached, blank, sober)
1
thick-skinned(adjective, cool, detached, blank, sober)
1
toneless(adjective, cool, detached, blank, sober)
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APASmart Define. (2015). undemonstrative thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/undemonstrative/thesaurus/synonyms
ChicagoSmart Define. 2015. "undemonstrative thesaurus" https://smartdefine.org/undemonstrative/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, undemonstrative thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/undemonstrative/thesaurus/synonyms>.
MLASmart Define. "undemonstrative thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/undemonstrative/thesaurus/synonyms>