The literal meaning of "滴水不漏" is that not a single drop of water leaks out, describing a container that is extremely watertight. By extension, it means that one's speech, actions, writing, or plans are very rigorous and thorough, with no loopholes or flaws. It originates from Zhu Xi's "Classified Conversations of Master Zhu" in the Southern Song Dynasty. Originally, it referred to Confucian scholars' exhaustive exposition of moral principles and meanings, and later it came to be widely used in daily life. Usage scenarios include: describing a person who speaks cautiously and does not leak secrets; describing a plan or arrangement that is comprehensive and impeccable; describing tight defense with no gap to exploit. This idiom is commendatory and is often synonymous with "天衣无缝" and "无懈可击", but it places more emphasis on the state of being "completely sealed, with nothing omitted." In terms of cultural background, it reflects the traditional Chinese esteem for "cautious speech" and "thoroughness," especially in conducting oneself in society and in strategic planning, where achieving a "滴水不漏" state is regarded as a high-level ability. In emotional coloring, it carries a sense of praise and affirmation, but it can sometimes also be used to describe someone who is overly cautious and therefore appears rigid.
📝 Example
1. The terms of this contract are written so airtight that the interests of both parties are fully protected. (Describing terms that are meticulous and comprehensive, with no loopholes.)
2. He was airtight when answering reporters' questions, neither revealing any secrets nor appearing insincere. (Describing cautious and flawless wording.)