penetration of light, radiation, liquid, etc.

to penetrate

bright, light, luminous / merry, cheerful

bright, light, luminous / merry, cheerful

a curtain (both literal, as in a window covering: “open the curtains to let in the light”, and figurative, as in a barrier: “the Iron Curtain”)

room (of a house or hotel), chamber, apartment, flat / (sumo) a stable where rikishi live and train together under a shisho oyakata (stable master)

a light, beam, illumination / a gleam, glow, ray / a glimmer, shine, sparkle / a luster/lustre, polish, sheen / glory, influence, power / a glimmer, gleam / positive aspect

Bamboo Curtain

a green wall (a wall covered by greenery)

緑のカーテン: a green wall (a wall covered by greenery)