内うち扉とびら

noun

internal door; inner door

Refers to a door located inside a building or structure, as opposed to an exterior door. Often used in architectural or descriptive contexts.

• この建たて物ものの内うち扉とびらはすべて木もく製せいです。

  All the internal doors in this building are made of wood.

• 内うち扉とびらを開あけると、広ひろいリビングがあった。

  When I opened the inner door, there was a spacious living room.