The idiom "one's lips are sealed" originated from the practice of physically sealing or closing one's lips to ensure silence. The phrase signifies a commitment to keeping information confidential or maintaining secrecy. It implies that the person will not disclose or reveal any sensitive or confidential information, often in response to a request or when entrusted with a secret. This idiom emphasizes a strong determination to remain silent and not divulge any information, reinforcing the idea of maintaining confidentiality or privacy.

英語での「one's lips are sealed」の定義と意味

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