135 entries under adjective topic. ×

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cynical(hard, unfeeling, unsympathetic, hardened)
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disdainful(hard, unfeeling, unsympathetic, hardened)
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feelingless(hard, impassive, insensitive, unsusceptible)
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habituated(hard, unfeeling, unsympathetic, hardened)
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hard-as-nails(hard, unfeeling, unsympathetic, hardened)
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hard-nosed(hard, unfeeling, unsympathetic, hardened)
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hard as nails(expression, idiom, hard, impassive)
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immobile
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impenetrable(hard, unfeeling, unsympathetic, hardened)
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imperceptive(hard, impassive, insensitive, unsusceptible)
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imperturbable
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impious(hard, unfeeling, unsympathetic, hardened)
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inaccessible(hard, unfeeling, unsympathetic, hardened)
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inexpressive(detached, impassive, unresponsive, dispassionate)
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inhuman
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insouciant
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irreverent(hard, unfeeling, unsympathetic, hardened)
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lackadaisical
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nonchalant
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pitiless(unfeeling, unsympathetic, uncaring, insensitive)
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APASmart Define. (2015). unimpressionable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unimpressionable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unimpressionable thesaurus" https://smartdefine.org/unimpressionable/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, unimpressionable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unimpressionable/thesaurus/synonyms>.
MLASmart Define. "unimpressionable thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/unimpressionable/thesaurus/synonyms>