gear
— Noun
– English
～ equipment consisting of miscellaneous articles needed for a particular operation or sport etc.
gear case
— Noun
– English
～ the shell (metal casing) in which a train of gears is sealed
gear box
— Noun
– English
～ the shell (metal casing) in which a train of gears is sealed
gear
— Noun
– English
～ a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
gear
— Noun
– English
～ 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"