100 entries under apathetic topic. ×

8
heartless(adjective, hard, cool, careless, indifferent)
8
insouciant(adjective, calm, cool, relaxed, cold)
8
neutral(adjective, calm, quiet, cool, moderate)
8
spiritless(adjective, dull, hard, cool, weak)
7
passive(adjective, calm, dull, indifferent, still)
7
stony(adjective, hard, careless, cold, indifferent)
7
unimpressionable(adjective, hard, careless, indifferent, cruel)
7
unsusceptible(adjective, hard, careless, indifferent, cruel)
7
unsympathetic(adjective, hard, careless, indifferent, cruel)
6
insentient(adjective, hard, careless, cold, indifferent)
5
distant(adjective, cool, indifferent, restrained, detached)
5
hard-hearted(adjective, calm, indifferent, restrained, detached)
5
lukewarm(adjective, calm, cool, temper, relaxed)
5
smooth(adjective, calm, quiet, cool, relaxed)
5
soulless(adjective, hard, careless, indifferent, cruel)
4
remote(adjective, cool, indifferent, restrained, detached)
4
unimpressible(adjective, calm, cool, relaxed, detached)
4
uninvolved(adjective, calm, indifferent, detached, aloof)
4
unperturbed(adjective, calm, cool, relaxed, indifferent)
3
blase(adjective, calm, cool, relaxed, cold)
11 years ago|20k views|share |citing 
APASmart Define. (2015). impassive thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/impassive/thesaurus/synonyms
ChicagoSmart Define. 2015. "impassive thesaurus" https://smartdefine.org/impassive/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, impassive thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/impassive/thesaurus/synonyms>.
MLASmart Define. "impassive thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/impassive/thesaurus/synonyms>