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vexing(delicate, complex, tricky, complicated)
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APASmart Define. (2015). formidable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms
ChicagoSmart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, formidable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>.
MLASmart Define. "formidable thesaurus" 17 July 2015. Web. 22 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms>