悶悶不樂

Stuffy, airless, or closed tightly; bored, depressed, or feeling down; to cover or seal something up; to stay in one place for a long time.

Function word; no; not; un-; negative prefix; used to form questions or emphasize a statement; sometimes used for rhythm.

Happy; cheerful; to laugh; enjoyment; pleasure; music; a surname; used in place names.