KanjiJLPT N1
Front Door

front door, title page, front page

Mnemonic

The Front Door of a prison is no ordinary door — it's a towering, iron-hinged gate that swings open with a thunderous groan. Every prisoner remembers that front door vividly: the last door they walked through as a free person.
Additional thoughts
Picture massive hinged doors at a prison's formal entrance — imposing, heavy, swinging dramatically. The front door is the threshold between freedom and captivity. Door radical on the outside, prison radical nested inside.
Quick recall
The Front Door of a prison is a massive hinged door — the last one you walk through free.

Details

The keyword for 扉 is front door. This kanji refers specifically to a door that swings open on hinges, typically the main entrance door of a building or house. It carries a sense of formality and importance, distinguishing it from sliding doors or simple openings. By extension, it can also refer to the beginning or opening of something, such as the title page of a book.
On'yomi
Kun'yomi
とびら

Used in vocab