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Western-style clothes (cf. traditional Japanese clothes)
洋服ようふくを買いかいに行こういこう。
Let's go buy some clothes.
この洋服ようふくは色いろがきれいですね。
The color of these clothes is beautiful.
洋服ようふくのサイズが合わあわなくなってしまった。
My clothes don't fit anymore.