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A person who keeps secrets very well and never reveals confidential information.
律师是一个守口如瓶的人，绝对不会透露客户的隐私。
A lawyer is a tight-lipped person who would never disclose a client's privacy.
她守口如瓶，即使受到威胁也不会透露任何信息。
She is as tight-lipped as a bottle; she wouldn't reveal any information even under threat.
Often used to describe someone who maintains confidentiality in professional or sensitive contexts.
In business or legal settings, describing someone as '守口如瓶的人' implies they are highly trustworthy and reliable in handling confidential information.
Do not use this phrase to describe someone who is simply quiet or introverted; it specifically implies secrecy about sensitive information.
The phrase originates from the Chinese idiom '守口如瓶' (shǒu kǒu rú píng), which means 'to keep one's mouth as sealed as a bottle.' It was first recorded in the Tang Dynasty text '群书类要' (Qúnshū Lèiyào) and metaphorically describes someone who maintains strict silence about secrets.
This phrase is commonly used in both formal and informal contexts to praise someone's discretion or to describe their natural tendency to keep secrets. It is often used in professional settings (e.g., lawyers, accountants) or in personal relationships where trust is critical.