74 entries under hard topic. ×

8
impassive(adjective, careless, indifferent, cruel)
8
insusceptible(adjective, affect, dead, insensitive)
8
unsusceptible(adjective, careless, indifferent, cruel)
6
unfeeling(adjective, careless, indifferent, cruel)
5
heartless(adjective, careless, indifferent, cruel)
5
impassible(adjective, affect, dead, impassive)
5
insensitive(adjective, careless, indifferent, cruel)
5
spiritless(adjective, careless, indifferent, cruel)
5
unemotional(adjective, detached, unfeeling, unsympathetic)
4
cold(adjective, careless, indifferent, cruel)
4
cold-blooded(adjective, careless, indifferent, cruel)
4
soulless(adjective, careless, indifferent, cruel)
3
callous(adjective, cruel, detached, unfeeling)
3
coldhearted(adjective, detached, unfeeling, unsympathetic)
3
indifferent(adjective, careless, cruel, detached)
3
insensible(adjective, careless, indifferent, cruel)
3
insentient(noun, adjective, careless, indifferent)
3
unsympathetic(adjective, careless, indifferent, cruel)
2
inflexible(adjective, careless, indifferent, cruel)
2
obtuse(adjective, unfeeling, unsympathetic, insensitive)
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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>