65 entries under impassive topic. ×

1
uncompassionate(adjective, calm, dull, flat, detached)
1
unexcitable(adjective, calm, dull, flat, detached)
1
unimpressionable(adjective, detached, unresponsive, laid-back)
1
with straight face(expression, adjective, idiom, cool, detached)
0
inexpressive(adjective, detached, unresponsive, dispassionate)
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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>