47 entries under hard topic. ×

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delicate(sharp, exact, tricky, complicated)
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formidable(tricky, complicated)
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hard to explain(expression, idiom, tricky, complicated)
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hard to solve(expression, idiom, tricky, complicated)
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obstinate(tricky, complicated)
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troublesome(tricky, complicated)
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vexing(tricky, complicated)
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APASmart Define. (2016). enigmatic thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/enigmatic/thesaurus/synonyms
ChicagoSmart Define. 2016. "enigmatic thesaurus" https://smartdefine.org/enigmatic/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, enigmatic thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/enigmatic/thesaurus/synonyms>.
MLASmart Define. "enigmatic thesaurus" 29 March 2016. Web. 27 September 2026. <https://smartdefine.org/enigmatic/thesaurus/synonyms>