空穴来风 kōng xué lái fēng

DEFINITIONS

  1. lit. wind from an empty cave (idiom)
  2. fig. unfounded (story)
  3. baseless (claim)

CHARACTERS

空 kōng
HSK 3
empty, hollow, bare, deserted
穴 xué
HSK 6
cave, den, hole; KangXi radical 116
来 lái
HSK 1
come, coming; return, returning
风 fēng
HSK 3
wind; air; manners, atmosphere