Think of one quick push and a slide. A foot kicks off, and a person or a thing shoots a short way along the ground and stops. Short distance, sudden start, staying low and touching the surface, over almost before you noticed it. Every use of scoot keeps that shape, whether it is a friend leaving, a chair moving, or a dog on the carpet.
From the word’s history
The source records the origin as uncertain, with two guesses: Old Norse skjota, to shoot, or a Middle English word for scampering. Either guess fits the picture of something shot off and sliding away.
來源沒有定論。字典給的兩條線索，一條是古北歐語的 skjóta（射出去），一條是中古英語表示「快步跑」的字。兩條都對得上「被彈出去、滑走」這個畫面。這是線索，不是確定的歷史。
Wiktionary entry scoot (kaikki:3f6f69a190036ae4:662491801): Of uncertain origin. Perhaps from Old Norse skjóta (to shoot), or perhaps related to Middle English scottlynge.
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