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.