76 entries under hard topic. ×

43
indifferent(adjective, calm, dull, cool)
31
apathetic(adjective, calm, dull, cool)
22
unemotional(adjective, calm, dull, quiet)
20
unconcerned(adjective, calm, dull, quiet)
18
aloof(adjective, calm, quiet, cool)
18
uncaring(adjective, cold, attitude, careless, indifferent)
17
insensible(adjective, dull, cool, slow)
16
insensitive(adjective, dull, temper, careless)
15
callous(adjective, calm, cool, cold)
14
cold(adjective, calm, cool, tough)
14
unfeeling(adjective, calm, cool, tough)
13
unresponsive(adjective, calm, dull, careless)
12
cold-blooded(adjective, calm, cool, tough)
12
impassible(adjective, temper, cold, indifferent)
10
unaffected(adjective, tough, temper, careless)
9
incurious(adjective, calm, cool, relaxed)
8
heartless(adjective, cool, careless, indifferent)
8
spiritless(adjective, dull, cool, weak)
7
insusceptible(adjective, cool, affect, dead)
7
stony(adjective, careless, cold, indifferent)
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>