Synonyms|1.2kAntonyms|358|Broader|14Narrower|3Related|971
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impractical
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impuissant
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inadvisable
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inapt
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incautious
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inchoate
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indecent
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indecorous
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indigent
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indisposed
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ineligible
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inexpressible
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inferior
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inopportune
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insipid
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insufficient
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invidious
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ironic
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jackleg
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lacking
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APASmart Define. (2016). able thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/able/thesaurus/antonyms
ChicagoSmart Define. 2016. "able thesaurus" https://smartdefine.org/able/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, able thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/able/thesaurus/antonyms>.
MLASmart Define. "able thesaurus" 14 March 2016. Web. 21 September 2026. <https://smartdefine.org/able/thesaurus/antonyms>