gear

Set the level or character of.

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

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

“the fool got his tie caught in the geartrain”

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

Equipment consisting of miscellaneous articles needed for a particular operation or sport etc.