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use; service; purpose
この道具は用途が広くて便利だと思うよ。
I think this tool is useful because it has many uses.
用途に合わせて適切な製品を選ぶべきだろう。
You should choose appropriate products according to the purpose.
この部屋の用途を変えてオフィスにしよう。
Let's change the use of this room and make it an office.