Words To Set A Dark Mood

adjective serious or gloomy in manner or attitude

• The economic forecast for the upcoming year is quite grim.
• The situation is looking pretty grim, we might need to come up with a new plan.
• Things are looking grim, we might be in a bit of a pickle.
• The clouds above were a grim reminder of the storm approaching.

noun no applicable parts of speech

adjective dark; shadowy; obscure

• The tenebrous atmosphere of the cave made it difficult to see beyond a few feet.
• I don't like walking through that tenebrous alley at night, it gives me the creeps.
• The tenebrous vibes at that party were too much for me, I had to leave early.
• His tenebrous thoughts clouded his judgment, leading to poor decision-making.