Synonyms|649Antonyms|194|Broader|12Narrower|0Related|467
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tedious
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tenebrous
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tire
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torment
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turbid
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twist
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wane(rise, extend)
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warp
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wash out(expression, color)
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waste away(expression, develop, raise, extend)
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whiten
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wind down
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worsen(verb, darken)
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wrinkle
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APASmart Define. (2015). brighten thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/brighten/thesaurus/antonyms
ChicagoSmart Define. 2015. "brighten thesaurus" https://smartdefine.org/brighten/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, brighten thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/brighten/thesaurus/antonyms>.
MLASmart Define. "brighten thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/brighten/thesaurus/antonyms>