melancholy

nouns

a feeling of thoughtful sadness
melancholy
is a type of (narrower)
emotions experienced when not in a state of well-being
sadness, unhappiness
a constitutional tendency to be gloomy and depressed
melancholy
is a type of (narrower)
a mental state characterized by a pessimistic sense of inadequacy and a despondent lack of activity
depression
a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy
black bile, melancholy

adjectives

characterized by or causing or expressing sadness
"growing more melancholy every hour"; "her melancholic smile"; "we acquainted him with the melancholy truth"
melancholic, melancholy
grave or even gloomy in character
"solemn and mournful music"; "a suit of somber black"; "a somber mood"
melancholy, somber, sombre