melancholy
A gloomy state of mind, often a gloomy state that is of some continuance, or habitual; depression of spirits induced by grief; dejection of spirits. This was formerly supposed to proceed from a redundance of black bile. Melancholy, when extreme and of long continuance, is a disease, sometimes accompanied with partial insanity. Cullen defines it, partial insanity without dyspepsy. In nosology, mental-alienation restrained to a single object or train of ideas, in distinction from mania, in which the alienation is general. Moon-struck madness, moping melancholy.