front door, title page, front page
扉 centers on a physical entryway that opens and closes: a front door. The title page and front page senses extend this idea as the 'door' or opening to a book's content.
扉 combines 户 (door) with 非, which likely contributes the sound and may have originally depicted a pair of wings or a double door, reinforcing the idea of a hinged opening.
The top 户 is a door, and the bottom 非 looks like two swinging panels. Picture a front door made of two leaves that open outward.
For ヒ, imagine a front door that makes a soft 'hee' sound when it opens: hee -> ヒ, and the door swings wide.
door; gate; opening
frontispiece
door(s) of a gate
glass door
chapter title page; divisional title
twenty questions (game)
trapdoor; trap door
internal door; inner door
front door (of a cabinet, bus, etc.)
revolving door
The Door into Summer (1957 novel by Robert A. Heinlein)
external door; outer door
opening a door for a moment (esp. on the train, when someone's foot is stuck, etc.)
rear door (esp. of a bus)
Japanese cheesewood (Pittosporum tobira)
doorway; door; hatch
brushwood door; brushwood gate
watertight door
automatic door
back leaf