train window; car window
Refers to the window of a train, car, or other vehicle, often used when describing the view from inside.
I could see Mt. Fuji from the train window.
I traveled while enjoying the scenery from the car window.
Mt. Fuji was visible from the train window.
I traveled while enjoying the scenery from the train window.
He was lost in thought while gazing out the train window.
車窓 means the window of a vehicle (used for the view outside), while 車中 means the inside of a vehicle itself.
Compound of 車 (sha, 'vehicle') and 窓 (sō, 'window').