Translation guide
The top covering of a building, vehicle, or structure. In Japanese, the most common word is 屋根 (yane) for buildings, but other terms apply to specific contexts like cars, mouths, or metaphorical roofs.
The top covering of a house, building, or structure.
The standard word for the roof of a building. Used in everyday conversation.
There is a cat on the roof.
The roof is leaking, so I have to repair it.
Rooftop, specifically a flat roof area used as a space, like on a building where people can go. Not for sloped roofs.
Loanword from English, used in some compound terms or stylish names, but not common for ordinary roofs.
The top part of a car, bus, or train.
Also used for vehicle roofs, though context makes it clear.
The upper inside surface of the mouth.
A figurative upper limit or covering, like a price ceiling or the top of the world.
The overhead rock surface inside a cave or tunnel.
Used for the ceiling/roof of caves, tunnels, and mines.
屋根 (yane) is the exterior roof, the top covering of a building. 天井 (tenjō) is the interior ceiling, the surface you see from inside a room. Do not confuse them.
The roof is leaking.
The roof is leaking.
屋上から花火を見た。
We watched fireworks from the rooftop.
roof balcony
車の屋根に雪が積もっている。
Snow is piled up on the car roof.
Common in automotive contexts, e.g., sunroof, roof rack.
a car with a sunroof
Anatomical term for the palate. Used in medical or formal contexts.
I got a canker sore on the roof of my mouth.
Colloquial expression meaning 'ceiling of the mouth'. More common in everyday speech than 口蓋.
I burned the roof of my mouth on hot pizza.
Means ceiling, but used metaphorically for upper limits (e.g., price ceiling, glass ceiling).
Break through the glass ceiling.
A price ceiling has been set.
Upper limit, cap. More direct for numerical or regulatory limits.
The budget ceiling is 1 million yen.
Icicles are hanging from the cave roof.
There is a light on the ceiling.
The loanword ルーフ is mainly used in automotive or stylistic compound words. Using it for a house roof sounds unnatural. Stick to 屋根.
We went up to the roof.
I burned the roof of my mouth.