The term "id" refers to the subconscious and instinctual part of one's psyche. Some synonyms for "id" include the unconscious, inner self, and primal self. Other terms that are often associated with the id include the "shadow self," "wild self," and "reptilian brain." While the id is a vital part of human experience, it can also lead to impulsive behavior and self-destructive tendencies. As a result, some people may associate the id with negative qualities. However, it is essential to recognize that the id serves an important purpose in helping individuals satisfy their basic needs and survive in a complex world.