機内

1. Origins, structure, and basic meaning

• Structure: 機内(きない) is a place noun referring to the inside of an aircraft.
• Basic usage: It describes the space where passengers change phone settings or crew members distribute drinks.

2. Common pitfalls and similar expressions

• Interior names by vehicle
  • 機内 is inside an aircraft, 車内 inside a car or train, and 船内 inside a ship.
• Location and path of movement
  • 機内で marks where an action happens; 機内を回る describes moving around through the cabin.