Synonyms|649Antonyms|194|Broader|12Narrower|0Related|467
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ruin
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shadow(verb, dark)
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shadowy
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shady
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slack off(expression, fight, reach)
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slow
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soft
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soil
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somber
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sombre
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sorrow
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sorrowful
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spoil
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stanch
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stump
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stupid
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sullen
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sully
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tangle
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taper off
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APASmart Define. (2015). brighten thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/brighten/thesaurus/antonyms
ChicagoSmart Define. 2015. "brighten thesaurus" https://smartdefine.org/brighten/thesaurus/antonyms (accessed September 27, 2026).
HarvardSmart Define 2015, brighten thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/brighten/thesaurus/antonyms>.
MLASmart Define. "brighten thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/brighten/thesaurus/antonyms>