1. Thank god! He has got over his melancholy.
2. He was then depressed and in despair.
3. I was oppressed with the intense heat.
4. I'm down in the dump and to think it's such a nice day outside!
5. She was silent, and I guessed at her unutterable depression.
6. Being unhappy is like an infectious disease.
7. Joe has been under a cloud since his daughter died.
8. Is he annoyed by being placed last in the contest?