146 entries under adjective topic. ×

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unsufficient(weak, short, weakening, worsening)
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unthriving(weak, short, weakening, worsening)
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waning(weakening, worsening, deteriorating)
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wanting(weak, short, weakening, worsening)
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weakening(worsening, deteriorating)
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worsening(weakening, deteriorating)
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APASmart Define. (2016). unsuccessful thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unsuccessful/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsuccessful thesaurus" https://smartdefine.org/unsuccessful/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, unsuccessful thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unsuccessful/thesaurus/synonyms>.
MLASmart Define. "unsuccessful thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/unsuccessful/thesaurus/synonyms>