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ice
shaved ice (usually served with flavored simple syrup)
コップに氷を入れて、冷たい水を飲みます。
I put ice in a glass and drink cold water.
冬になると湖の水が氷になる。
The lake water turns to ice in winter.
今朝、道路が氷になっていて危険でした。
This morning, the road was icy and dangerous.