Synonyms|174Antonyms|19|Broader|0Narrower|0Related|211
1
difficult
1
drugged
1
emotionless(adjective, detached, impassive, unresponsive, laid-back)
1
flat(adjective, detached, impassive, unresponsive, laid-back)
1
frosted
1
frosty
1
glacial(adjective, detached, impassive, unresponsive, insensitive)
1
going with the flow(expression, adjective, idiom, detached, impassive)
1
hard-bitten(adjective, hard, careless, indifferent, cruel)
1
hard-boiled(adjective, hard, careless, indifferent, cruel)
1
hard-hearted(adjective, detached, impassive, unresponsive, insensitive)
1
hardened(adjective, hard, careless, indifferent, cruel)
1
hardhearted(adjective, hard, careless, indifferent, cruel)
1
harsh
1
immune to(expression, adjective, dead, insensitive, insusceptible)
1
impenitent(adjective, hard, careless, indifferent, cruel)
1
impervious
1
impervious to(expression, adjective, dead, insensitive, insusceptible)
1
indurated(adjective, hard, careless, indifferent, cruel)
1
inexcitable
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ChicagoSmart Define. 2015. "unimpressionable thesaurus" https://smartdefine.org/unimpressionable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, unimpressionable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unimpressionable/thesaurus/synonyms>.
MLASmart Define. "unimpressionable thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/unimpressionable/thesaurus/synonyms>