密不透风
Traditional form:
密不透風
Pinyin (reading):
mìbùtòufēng
Definitions:
- sealed off
- impenetrable
Characters:
- 密 - secret, confidential; intimate, close; dense, thick
- 不 - no, not, un-; negative prefix
- 透 - to pierce, to penetrate, to pass through; thorough
- 风 - wind; air; customs, manners; news
Traditional characters: