Synonyms|1kAntonyms|239|Broader|5Narrower|0Related|1.1k
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hardheaded
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headstrong
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heavy
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heavy-handed
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heedless
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hunky dory(expression, upset, friendly)
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iced
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icy
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ignorant(adjective, indifferent, unfriendly)
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immune
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immune to(expression, sensitive)
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imperceptive
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impervious(adjective, unable)
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impervious to(expression, sensitive)
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implacable
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inaccessible
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inanimate
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incommensurate
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indolent
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inelastic
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APASmart Define. (2016). responsive thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/responsive/thesaurus/antonyms
ChicagoSmart Define. 2016. "responsive thesaurus" https://smartdefine.org/responsive/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, responsive thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/responsive/thesaurus/antonyms>.
MLASmart Define. "responsive thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/responsive/thesaurus/antonyms>