The crossword solution for the term FIRST OR NEUTRAL is GEAR. GEAR is a mechanical device consisting of a toothed wheel or a set of toothed wheels that can be connected to a motor or engine in order to transmit motion or power. It is used to change the speed, torque, and direction of a motor or engine. Gears are used in many different machines, from cars to clocks, and are essential components of any machine that requires motion.