Psyche
Etymology
Greek "psyche" meant breath, then soul or life; in myth, Psyche was a mortal woman loved by Eros, and the word doubled as the Greek for butterfly, an image of the departing soul. It underlies "psychology," "psychiatry," and the modern "psyche."
noun · /SY-kee/
The soul, mind, or animating self.
What it names
It gives a single word for the inner life as a whole — not the brain, but the self that thinks and feels.
Example
The trauma left a mark not just on her behavior but on the whole psyche, reorganizing how she met the world.
Related idea
The soul-root beneath psychosis and psychosomatic, the very place where mind (psyche) and body meet.