• Simplified
  • Traditional
 
Idiom
vanish into thin air
disappear off the face of the earth
 
 
Meaning
suddenly be gone without leaving any trace
 
 
Usage
I know I left my keys here, they cannot have just disappeared off the face of the earth.
 
 
Usage
If your close associates are undependable, a lot of money can simply vanish into thin air.
 
 
Story
The expression 不翼而飞 literally means fly without wings and it originated during the Warring States period.
 
 
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