The patrolman walks around this neighborhood every day.

patrolman 是由名词 patrol（巡逻）加上后缀 -man（人）组成的复合词，字面意思是"巡逻的人"，指"巡警"或"巡逻警察"。patrol 本身来自法语，原指"在特定区域进行巡视"的行为。