ㄅㄨˇㄎㄨㄞˋkuài

  1. 衙門擔任緝拿人犯差役醒世恆言·○·逃生》:同知晚上回府便會捕快次日解官。」紅樓夢·》:咱們見官省得捕快。」捕人」、捕役」、步快」。偵探

bailiff responsible for catching criminals (in Imperial China)​