66 entries under toughened topic. ×

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hard(adjective, unfeeling, unsympathetic, hardened)
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hard-edged(adjective, cynical, hard-boiled, hard-bitten)
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hard-nosed(adjective, hard, unfeeling, unsympathetic, hardened)
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hard as nails(expression, idiom, unfeeling, unbending)
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impassive(adjective, hard, unfeeling, unsympathetic, hardened)
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impenitent(adjective, hard, unfeeling, unsympathetic, hardened)
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indifferent(adjective, hard, unfeeling, unsympathetic, hardened)
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inflexible(adjective, hard, unfeeling, unsympathetic, hardened)
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insensate(adjective, hard, unfeeling, unsympathetic, hardened)
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insensible(adjective, hard, unfeeling, unsympathetic, hardened)
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insensitive(adjective, hard, unfeeling, unsympathetic, hardened)
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insentient(adjective, hard, unfeeling, unsympathetic, hardened)
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soulless(adjective, hard, unfeeling, unsympathetic, hardened)
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spiritless(adjective, hard, unfeeling, unsympathetic, hardened)
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stiff(adjective, hard, unfeeling, unsympathetic, hardened)
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stony(adjective, hard, unfeeling, unsympathetic, hardened)
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thick-skinned(adjective, hard, unfeeling, unsympathetic, hardened)
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torpid(adjective, hard, unfeeling, unsympathetic, hardened)
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tough(adjective, hard, violent, wild, fierce)
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unaffected(adjective, hard, unfeeling, unsympathetic, hardened)
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APASmart Define. (2015). impious thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impious/thesaurus/synonyms
ChicagoSmart Define. 2015. "impious thesaurus" https://smartdefine.org/impious/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, impious thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impious/thesaurus/synonyms>.
MLASmart Define. "impious thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/impious/thesaurus/synonyms>