Refers to the physical door or the entrance area of a building, especially in a house or small building. Slightly more formal than ドア.
I stood at the doorway and peered inside.
I forgot to lock the door.
She was standing at the doorway waiting for me.
The cat quietly came in through the doorway.
My family greeted me at the doorway.
入り口 refers broadly to any entrance point, whereas 戸口 emphasizes the actual door or doorway itself, often of a traditional dwelling.
ドア is the common word for a Western-style door, while 戸口 often implies a traditional Japanese entrance or smaller doorway and is slightly more formal.
戸口 is the everyday modern word for a doorway or entrance, while this archaic sense of 戸 for 'entrance' is rarely used alone today.
玄関 is the entrance hall or foyer area of a house, while 戸口 is the door or doorway itself, not the room behind it.
small wooden door at the rear of a noh stage · small garden gate
Compound of 戸 (to, 'door') and 口 (kuchi, 'mouth; opening'). The reading とぐち is a standard rendaku form.