The story
From the German Tiefenpsychologie, reportedly coined by Eugen Bleuler (1857-1939).
Etymology from Wiktionary, CC BY-SA 4.0.
depth psychology
Today it means: An approach to psychology which attempts to describe and explain the structure, content, and relationship of conscious and unconscious mental activity, and which is intended to serve as a basis for psychoanalytic therapies. Full definition →