hold.back
n.（名词）
The act of holding back.制止，停止：暂时停顿的行为Something held back.被扣下的东西A device that retains or restrains.阻碍物：用来抑制或保留的装置A strap or an iron between the shaft and the harness on a drawn wagon, allowing the horse to stop or back up.马车上辕和挽具之间用来控制马停或后退的皮套或铁板
