gear

Gear has 1 syllable.

verb. Set the level or character of.

noun. A mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle).

noun. Wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed.

noun. A toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion.