49 entries under impassive topic. ×

6
unfeeling(adjective, hard, careless, indifferent, cruel)
5
heartless(adjective, hard, careless, indifferent, cruel)
5
impassible(adjective, hard, affect, dead)
5
insensitive(adjective, hard, careless, indifferent, cruel)
5
unemotional(adjective, hard, detached, unfeeling, unsympathetic)
4
cold(adjective, hard, careless, indifferent, cruel)
4
passionless(adjective, detached, unresponsive, insensitive)
3
callous(adjective, hard, cruel, detached, unfeeling)
3
coldhearted(adjective, hard, detached, unfeeling, unsympathetic)
3
cool(adjective, detached, unresponsive, reticent)
3
dispassionate(adjective, detached, unresponsive, reticent)
3
frigid(adjective, detached, unresponsive, laid-back)
3
indifferent(adjective, hard, careless, cruel, detached)
3
unsympathetic(adjective, hard, careless, indifferent, cruel)
2
chill(adjective, detached, unresponsive, insensitive)
2
objective(adjective, detached, unresponsive, dispassionate)
2
unresponsive(adjective, hard, careless, indifferent, cruel)
1
along for the ride(expression, adjective, idiom, detached)
1
apathetic(adjective, hard, careless, indifferent, cruel)
1
blah(adjective, detached, unresponsive, laid-back)
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APASmart Define. (2015). unimpressionable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unimpressionable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unimpressionable thesaurus" https://smartdefine.org/unimpressionable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unimpressionable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unimpressionable/thesaurus/synonyms>.
MLASmart Define. "unimpressionable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unimpressionable/thesaurus/synonyms>