Synonyms|531Antonyms|137|Broader|0Narrower|0Related|146
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trivial(adjective, upset, light)
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troubled(adjective, upset, light)
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unattainable(adjective, unsound, unlikely)
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uncertain(adjective, easy, bright)
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undecided(adjective, weak, yielding)
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undetermined(adjective, weak, yielding)
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unfeasible(adjective, unsound, unlikely)
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unfixed(adjective, weak, yielding)
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unimportant(adjective, upset, light)
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unlikely(adjective, unsound)
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unnatural(adjective, affected)
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unproficient(adjective, unsound, unlikely)
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unrealistic(adjective, unreasonable)
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unreasonable
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unseasoned(adjective, unsound, unlikely)
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unsensible(adjective, unreasonable)
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unserviceable(adjective, unsound, unlikely)
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unskilled(adjective, unsound, unlikely)
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unsound(adjective, unlikely)
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unstable(adjective, supple)
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APASmart Define. (2013). hardboiled thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hardboiled/thesaurus/antonyms
ChicagoSmart Define. 2013. "hardboiled thesaurus" https://smartdefine.org/hardboiled/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2013, hardboiled thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hardboiled/thesaurus/antonyms>.
MLASmart Define. "hardboiled thesaurus" 18 May 2013. Web. 26 September 2026. <https://smartdefine.org/hardboiled/thesaurus/antonyms>