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uncalled for(expression, adjective, mean, severe, harsh)
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uncompromising(adjective, cruel, pitiless, heartless, hardhearted)
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APASmart Define. (2011). having a killer instinct thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/having_a_killer_instinct/thesaurus/synonyms
ChicagoSmart Define. 2011. "having a killer instinct thesaurus" https://smartdefine.org/having_a_killer_instinct/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2011, having a killer instinct thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/having_a_killer_instinct/thesaurus/synonyms>.
MLASmart Define. "having a killer instinct thesaurus" 23 May 2011. Web. 24 September 2026. <https://smartdefine.org/having_a_killer_instinct/thesaurus/synonyms>