Meaning: showing deep unhappiness of thought."he stared with brooding eyes"appearing darkly menacing."a dark, brooding landscape"
Sentence:  His eyes are mystical and brooding.
Now the atmosphere is all dark and brooding.
For a long time I sat brooding.
The novel caught the brooding, anti-establishment mood of the times and became an instant bestseller
As he sat on his terrace brooding, Garbo went about propping him up with pillows and doing what she could to cheer him up.

Hope It helps you :))))