Common loanword used for roofs of buildings, vehicles, and structures. Often appears in compounds like ルーフトップ (rooftop) or ルーフバルコニー (roof balcony).
I opened the roof while driving to feel the breeze.
This car's roof is retractable.
We installed solar panels on the roof.
We loaded bicycles onto the roof and went on a trip.
That sports car has a low roof and looks stylish.
sunroof
high roof (of a car)
moonroof
rooftop
roof rack
roof garden
roof terrace; roof deck
cabinet roof
roof ventilator
Borrowed from English 'roof'.