The word 巡逻 (xúnluó) is formed by combining two characters, each contributing a core action to create a unified concept. The first character, 巡 (xún), inherently means to make rounds, to tour, or to patrol an area in a circuit. The second character, 逻 (luó), adds the dimension of scouting, reconnaissance, or inspecting the perimeter. When placed together, they sequentially depict and reinforce the complete action: to systematically move through and observe an area for the purpose of security and oversight, forming the holistic idea of "to patrol".