4
lackluster(adjective, dull, lifeless)
4
lonely
4
menacing
4
morose(adjective, gentle)
4
overcast(adjective, cloudy, darkened)
4
soft(strong, sharp)
4
sunless
4
unhappy
3
birdbrained
3
bleak(adjective, barren)
3
cowardly
3
daft(adjective, stupid, crazy)
3
darkened
3
darkish
3
dense
3
dire
3
dirty
3
disconsolate
3
doleful
3
dopey
10 years ago|9.8k views|share |citing 
APASmart Define. (2016). bright thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/bright/thesaurus/antonyms
ChicagoSmart Define. 2016. "bright thesaurus" https://smartdefine.org/bright/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, bright thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/bright/thesaurus/antonyms>.
MLASmart Define. "bright thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/bright/thesaurus/antonyms>