📖 Meaning
A lamp shrouded by a curtain and a sword concealed in a case — the truth is buried under layers of obscurity, making it difficult to discern and arousing suspicion. The idiom describes a situation where facts are hidden, motives are unclear, and nothing is what it seems on the surface.
📜 Origin Story
This idiom has no single documented classical source text. It emerged from literary usage in late imperial China as a vivid four-character figure of speech. The paired images — a curtained lamp that gives off a dim, uncertain glow, and a cased sword whose sharpness is hidden from view — together evoke the unsettling feeling of knowing something is there but being unable to see it clearly. The phrase circulated in Qing-dynasty literary circles and was used to describe ambiguous political situations, cryptic remarks, and interpersonal mysteries.
💡 Example Usage
他这番话帷灯匣剑，让人捉摸不透。
His words were like a lamp behind a curtain and a sword in a box — utterly inscrutable.
🏷️ Category
➕ Similar Idioms
➖ Opposite Idioms
🔤 Quick Facts
- Chinese: 帷灯匣剑
- Pinyin: wéi dēng xiá jiàn
- Literal Translation: curtain, lamp, box, sword
- Category: Clarity
- Characters: 4