空

PINYIN

kōng

DEFINITION
  • empty
  • air
  • sky
  • in vain
EXAMPLE
空气 / kōng qì 
air / atmosphere
PINYIN

kòng

DEFINITION
  • to empty，vacant，unoccupied，space，leisure，free time
EXAMPLE
有空 / yǒu kòng
to have time (to do sth)