Denver boot
noun🔊/ˌdenvə ˈbuːt/
🔊/ˌdenvər ˈbuːt/
(also boot)
(both North American English) (British English clamp, wheel clamp)
a device that is attached to the wheel of a car that has been parked illegally, so that it cannot be driven away 车轮夹锁（用于锁住违章停放的车辆）