Melancholy
mel·an·chol·y/ˈmelənˌkälē/
Noun:A deep, pensive, and long-lasting sadness.Adjective:Sad, gloomy, or depressed.Synonyms:
noun. sadness - melancholia - gloom - sorrow - dejection
adjective. sad - gloomy - melancholic - mournful - dismal - blue