天马行空 tiān mǎ xíng kōng

DEFINITIONS

  1. like a heavenly steed, soaring across the skies (idiom)
  2. (of writing, calligraphy etc) bold and imaginative
  3. unconstrained in style

CHARACTERS

天 tiān
HSK 1
sky, heaven; god, celestial
马 mǎ
HSK 3
horse; surname; KangXi radical 187
行 xíng
HSK 3
go; walk; move, travel; circulate
空 kōng
HSK 3
empty, hollow, bare, deserted