gear

noun
UK /ɡɪə/
US /ɡɪr/

Gears are wheels with teeth that help machines move and work.

The bike's chain turns the gears so the wheels spin.


OTHER MEANINGS

2. Equipment or things you need for an activity.

Don't forget your camping gear for the trip.

3. To prepare something for a certain purpose.

The class is geared toward beginners.

4. A lever or handle used to control a machine.

He pulled the gear to make the tractor go faster.