manic-depressive

This term describes a specific psychological state of extreme emotional oscillation. It carries a clinical weight, though in modern psychiatric practice, it has been largely superseded by the term bipolar disorder to reduce the stigma associated with the word manic. It evokes an image of a pendulum swinging between two opposing poles of human experience: an unsustainable peak of euphoria and a crushing trough of despair.

When used as a noun to describe a person, the term functions as a count noun. Because it describes a medical condition, it is typically used in formal clinical contexts or in older literature, whereas contemporary conversation favors person-first language, such as person with bipolar disorder, to avoid defining an individual solely by their diagnosis.