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