The idiom "square one" is believed to have originated in the game of Snakes and Ladders, where players who land on a snake's head are sent back to the beginning of the game. In modern usage, it can refer to any situation where a person or group has to start over from the beginning. It can apply to personal or professional contexts, and can refer to both minor and major setbacks.

英語での「square one」の定義と意味

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