gear

(noun) a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion. Synonyms: gear wheel, geared wheel, cogwheel.

(noun) wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed. Synonyms: gearing, geartrain, power train, train. Example: "The fool got his tie caught in the geartrain."

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

(noun) equipment consisting of miscellaneous articles needed for a particular operation or sport etc.. Synonyms: paraphernalia, appurtenance.

(verb) set the level or character of. Synonyms: pitch. Example: "She pitched her speech to the teenagers in the audience."