expression
stealthily; on tiptoe; without making a sound
Describes moving quietly and carefully, often to avoid being noticed. Commonly used with verbs like 歩く or 近づく.
彼は抜き足で部屋に入った。
He entered the room stealthily.
抜き足で近づいて、驚かせようとした。
I tried to sneak up on tiptoe and surprise them.