46 entries under hard topic. ×

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mystifying(tricky, complicated)
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obstinate(tricky, complicated)
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profound(tricky, complicated)
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unclear(tricky, complicated)
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unintelligible(tricky, complicated)
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vexing(tricky, complicated)
<123>
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APASmart Define. (2016). tangled thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/tangled/thesaurus/synonyms
ChicagoSmart Define. 2016. "tangled thesaurus" https://smartdefine.org/tangled/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, tangled thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/tangled/thesaurus/synonyms>.
MLASmart Define. "tangled thesaurus" 17 February 2016. Web. 25 September 2026. <https://smartdefine.org/tangled/thesaurus/synonyms>