5
dully
4
bleakly
4
darkly(adverb, sadly)
4
soberly
4
softly
4
unfortunately(adverb, misfortune)
3
dingily
3
drably
3
somberly
3
testily
3
vacuously
2
blackly
2
blankly
2
absentmindedly
2
abstractedly
2
abysmally
2
anciently
2
archaically
2
aromatically
2
dimly
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APASmart Define. (2015). brightly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/brightly/thesaurus/antonyms
ChicagoSmart Define. 2015. "brightly thesaurus" https://smartdefine.org/brightly/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, brightly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/brightly/thesaurus/antonyms>.
MLASmart Define. "brightly thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/brightly/thesaurus/antonyms>