What is another word for retarding device?
Pronunciation: [ɹɪtˈɑːdɪŋ dɪvˈa͡ɪs] (IPA) 
A retarding device is used to slow down or resist the motion of an object. Synonyms for this term include braking system, decelerator, speed reducer, frictional force device, drag system, and stopping mechanism. A braking system may refer to any mechanism used to slow down or stop a moving object, such as a drum brake, disc brake or emergency brake. A decelerator is a device used to slow down the speed of an object in a controlled manner. A speed reducer refers to a mechanism used to decrease the speed of a motor, such as a gear or pulley system. A drag system is a mechanism used to resist the movement of an object. Lastly, a stopping mechanism is any device used to bring a moving object to a halt.
