63 entries under unintelligent topic. ×

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dummy(dull, witless)
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flat(adjective, silly, ridiculous, absurd, pointless)
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gullible(dull, witless)
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half-baked(dull, witless)
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half-witted(dull, witless)
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illogical(adjective, silly, ridiculous, absurd, pointless)
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indiscreet(dull, witless)
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insensate(dull, witless)
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laughable(dull, silly, absurd, witless)
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loser(dull, witless)
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naive(dull, witless)
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obtuse(dull, witless)
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out to lunch(expression, idiom, dull, witless)
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rash(dull, anxious, worried, frantic)
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shortsighted(dull, witless)
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simpleminded(dull, witless)
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slow(dull, witless)
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sluggish(dull, witless)
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stolid(dull, witless)
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stupefied(dull, witless)
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APASmart Define. (2016). futile thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/futile/thesaurus/synonyms
ChicagoSmart Define. 2016. "futile thesaurus" https://smartdefine.org/futile/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, futile thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/futile/thesaurus/synonyms>.
MLASmart Define. "futile thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/futile/thesaurus/synonyms>