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eaves
narrow aisle surrounding the core of a temple building
「軒」 has another reading with different meanings.
雨が降り始めたので軒下に入った。
I went under the eaves because it started raining.
突然の雨で軒の下に駆け込んだ。
I ducked under the eaves when it suddenly rained.
軒を並べて商店が並んでいて賑やかだ。
Shops are lined up side by side.