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to put on (lower-body clothing, e.g. pants, skirt, footwear); to wear
to affix (a sword to one's hip)
新しい靴を履いて出かけた。
I put on new shoes and went out.
寒いからズボンを二枚履いている。
I'm wearing two pairs of pants because it's cold.
スリッパを履かないで廊下を歩かないで。
Don't walk in the hallway without wearing slippers.