Where does the word ego originate?

The Word "ego" originates from the Latin Word "ego," which means "I" or "self." It was adopted into psychological terminology in the early 20th century, particularly by Sigmund Freud, who used it to describe the part of the psyche that mediates between the conscious and unconscious and is responsible for reality testing and a sense of personal identity. The concept has since evolved and is widely used in various contexts, including philosophy and everyday language.