扉 - front door, title page, front page

door; gate; opening

door(s) of a gate

watertight door

opening a door for a moment (esp. on the train, when someone's foot is stuck, etc.)

twenty questions (game)

chapter title page; divisional title

doorway; door; hatch

rear door (esp. of a bus)

iron door

fire door; fire shutter

external door; outer door

internal door; inner door