Railroad Car, Vehicle, Train Car, Railway Carriage, Railcar
noun
A car with more cars on both sides is a car that hooks into other cars... specifically other railroad cars. They have hooks on both sides, they hook into other cars, and they fit all the requirements of this vocab word's kanji.
しゃりょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
車両は大きいですね。
This vehicle is big.
車両はトンネルに入った。
The vehicle entered the tunnel.
前の車両は一号車です。
The vehicle ahead is the car No. 1.