The word "巡回" is formed by combining two characters, each contributing a core action to create a unified concept. The first character, "巡" (xún), carries the meaning of patrolling, making rounds, or moving through an area. The second character, "回" (huí), means to circle back, to return, or to revolve. When joined, they depict the action of moving through a series of points or locations and then coming back around to the beginning, thus forming the complete idea of making a circuit, touring around, or going on a repetitive route that covers multiple stops.