The word 回去 is formed by combining two directional characters that create a unified concept of motion: 回, which depicts returning or revolving back to a point of origin, and 去, which indicates leaving or going away from a current location. Together, they sequentially depict the action of first turning back (回) and then proceeding away (去), conceptually fusing into the single idea of "to go back" or "to return (to a place away from here)". Its formation is essentially a logical spatial combination of two inherent directional actions.