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To physically enter a room or space by stepping inside.
彼女は静かに部屋に足を踏み入れた。
She quietly stepped into the room.
This phrase emphasizes the action of entering a space, often with a sense of caution or formality.
This phrase is more formal than simply saying '部屋に入る' (to enter a room).
Composed of '部屋' (room), '足' (foot), and '踏み入れる' (to step into).
This phrase is often used to describe entering a room with a sense of purpose or caution.