Word Story
A motor is the part of a machine that turns energy into movement — the thing that spins, pushes or pulls so the rest of the device can do its job. In everyday British usage it also means the car itself, which is why insurance paperwork talks about a motor policy rather than a car policy. The word reaches further than engines, too: doctors and teachers talk about motor skills when they mean the physical movements a body can plan and carry out, from gripping a pencil to catching a ball. Compared with 'engine', it sounds a shade more technical and more formal, which is why it survives best in compound phrases such as motorway, motorcade and motorboat, where it names the power source rather than the whole machine. Detroit is still nicknamed Motor City for its long association with vehicle manufacturing, a phrase that has outlasted most of the industry it celebrated.