a sad and depressed state; low spirits.
'낙담'
_"he was slumped in deep dejection"
"He wandered around in a state of utter dejection. She made no effort to hide her dejection. With total dejection, she remarked, "What a waste." Those who experience prolonged feeling of sadness, dejection and hopelessness are usually suffering from depression.
I'm watching YouTube in a state of severe dejection. Becuase it is easy, nothing to move.