• 屋根やね — roof
• 部屋へや — room
• 本屋ほんや — bookstore
• 八百屋やおや — greengrocer
• 屋上おくじょう — rooftop

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The kanji 屋 originally means a roof or house, but is also used to indicate a place where something is sold or done — like a shop or dealer. It is one of the most common suffixes in words like 魚屋 (fish shop) or 本屋 (bookstore).

八百屋やおやで 野菜やさいを買かいました。
I bought vegetables at the greengrocer.

屋上おくじょうに出でて、空そらを見みました。
I went out to the rooftop and looked at the sky.