lype-, lypo- +

(Greek: grief; melancholia)

lypemania
Extreme mournfulness, sadness, or melancholy.
lypothymia
Mournfulness, sadness, or melancholy.
matutolypea
1. Morning depression.
2. Sadness felt by some people when getting up in the morning.
3. "Getting up on the wrong side of the bed in the morning."