光ひかりを通とおす

expression, godan verb (-su)

let light through; transmit light

Describes a material or opening that allows light to pass through it. Often used for translucent or transparent objects, or gaps that let light in.

• このカーテンは光ひかりを通とおすので、部屋へやが明あかるい。

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

• すりガラスは光ひかりを通とおすが、向むこう側がわは見みえない。

  Frosted glass transmits light, but you cannot see through to the other side.