92 entries under hard topic. ×

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sinister(severe, offensive, distressing, upsetting)
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startling(severe, offensive, distressing, upsetting)
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subtle(delicate, complex, tricky, complicated)
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tangled(tricky, complicated)
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thorny(delicate, complex, tricky, complicated)
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threatening(severe, offensive, distressing, upsetting)
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ticklish(delicate, complex, tricky, complicated)
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toilsome(severe, offensive, distressing, upsetting)
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uncertain(severe, offensive, distressing, upsetting)
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unclear(delicate, complex, tricky, complicated)
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unfathomable(tricky, complicated)
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unintelligible(delicate, complex, tricky, complicated)
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APASmart Define. (2015). vexing thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/vexing/thesaurus/synonyms
ChicagoSmart Define. 2015. "vexing thesaurus" https://smartdefine.org/vexing/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, vexing thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/vexing/thesaurus/synonyms>.
MLASmart Define. "vexing thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/vexing/thesaurus/synonyms>