motor
/moˈtoɾ/ · A2 · adj
driving force, driver, mover
⚙️🚗 motor = mot- (move) + -or (doer): the thing that moves things
From Latin motor, mover, from movere, to move. Same root as English motion, motive and motivate. As an adjective it means moving or driving; as a noun it is the engine, or figuratively the driving force behind something.