屋内(おくない)

Forms

屋(おく) (roof, building) + 内(ない) (inside)

Common collocations

• 屋内(おくない)プール: indoor pool
• 屋内(おくない)駐車場(ちゅうしゃじょう): indoor parking garage
• 屋内(おくない)競技(きょうぎ): indoor sports
• 屋内(おくない)施設(しせつ): indoor facility
• 屋内(おくない)禁煙(きんえん): no smoking indoors

Similar words

• 屋内(おくない): indoors (inside a building — formal)
• 屋外(おくがい): outdoors (outside a building — the antonym)
• 室内(しつない): inside a room (more specific)
• 中(なか): inside (general, casual)

Usage

More formal than 中(なか) and specifically refers to being inside a building, not just any enclosed space. Common in signage, facility descriptions, and regulations.