melancholia
nounExtreme, persistent sadness or hopelessness; depression. No longer in clinical use.
nounIn pathology, a mental condition characterized by great depression combined with a sluggishness and apparent painfulness of mental action.
nounSame as
A kind of mental unsoundness characterized by extreme depression of spirits, ill-grounded fears, delusions, and brooding over one particular subject or train of ideas.
nounDeep sadness or
Clinical depression, characterised by irrational fears,
extreme depression characterized by tearful sadness and irrational fears