The word 巡警 is formed by combining two meaningful characters: 巡, which conveys the idea of patrolling or making rounds, and 警, which signifies alertness, warning, or police. When placed together, they conceptually merge to create a new, specific term, not merely a "patrolling police" but the defined role of a "patrolman" or uniformed officer whose core duty is to conduct surveillance and maintain order on a beat. The formation is a direct semantic compounding where the first character describes the action and the second identifies the profession, resulting in a clear occupational title.