透とおり

noun

penetration (of light); transparency

Refers to the degree to which light passes through something, often used in contexts like fabric, glass, or paper. Not a common standalone word; usually appears in compound phrases or technical descriptions.

• このカーテンは透とおりが良よく、部屋へやが明あかるい。

  These curtains let light through well, so the room is bright.

• 紙かみの透とおりを調しらべる。

  Check the transparency of the paper.