不翼而飞 bù yì ér fēi

DEFINITIONS

  1. to disappear without trace
  2. to vanish all of a sudden
  3. to spread fast
  4. to spread like wildfire

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
翼 yì
HSK 6
wings; fins on fish; shelter
而 ér
HSK 3
and; and then; and yet; but
飞 fēi
HSK 1
fly; go quickly; dart; high