car
車 centers on a wheeled vehicle: a car, cart, or anything that rolls on wheels.
car; automobile; vehicle
train; electric train
car; automobile; motorcar; motor vehicle; auto
bicycle; bike
(wheeled) vehicle; car; (railroad) car; (railway) carriage; rolling stock
train; railway train
parking (a vehicle)
tank (military vehicle)
inside a car (train, bus, etc.)
boarding (a train, bus, etc.); getting into (e.g. a taxi)
car model
stopping (of a train, car, etc.); stop
departure (of a train, car, etc.); starting; leaving
wheelchair
traffic lane; road lane
body (of car); frame
(vehicle) wheel
coach (horse-drawn); carriage; wagon; cart
suffix for train car numbers
new car
alighting (from a train, bus, etc.); getting off; getting out (of a car)
garage; carport; depot (for trains, buses, etc.); shed; carbarn
roadway; road; carriageway
light motor vehicle (up to 660cc and 64bhp); k-car; kei car
車 is a pictograph of a cart or chariot seen from above, with the central vertical line representing the axle and the horizontal strokes the wheels and body.
The horizontal strokes are the wheels, the central vertical line is the axle, and the box in the middle is the body: 車 is a car.
For シャ, imagine a shiny new car: shiny -> シャ, and the car gleams under the sun.