gear

Dictionary definition · gear

a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
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 mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle)
equipment consisting of miscellaneous articles needed for a particular operation or sport etc.

set the level or character of"She pitched her speech to the teenagers in the audience"

Source: Open English WordNet (CC BY 4.0).