Vocabulary
옥상
rooftop
Meaning
옥상 : rooftop. The accessible outdoor upper surface of a building.
Why this form?
지붕 — “roof” is the covering, often inaccessible; 옥상 is usually a usable rooftop space.
Hanja
屋上 — 屋 building + 上 top.
Forms not to confuse
지붕
지붕에 눈이 쌓였어요. — Snow piled up on the roof.
Examples
옥상입니다. — It's the rooftop.
옥상에 올라가 봐요. — Let's go up to the rooftop.