lowering
Depressing
gloomy, dark
bleak
black, gloomy,
This rainy weather has made everything so dark, depressing and gloomy.
Stygian.
The chambers of the castle were dark and gloomy. Just because our team lost, there is no need to be gloomy and dejected.
The likely word is "gloomy" (dark, or dismal).
Misery
dark, raven, ebony, shadowy, gloomy
gloomy
The word is Stygian.