Meaning of Giyar in English. How does Gear look like

A gear is a rotating wheel with teeth in it to attach with other toothed parts and transmit the torque. When two or more gears are working in a sequence, it is called a transmission. In the automobile, gears transmit power from the crankshaft to the drive shaft, which ultimately helps move the vehicle forward. A transmission or several gears working in sequence allows one to switch between them as the speed of vehicle changes.