Correct

窗洞

/ chuāng dòng /
Strokes

Example

As a Noun

opening in a wall (to let in light and air)

1
xiē
那些
jiù
破旧
de
fáng
房屋
méiyǒu
没有
chuānghu
窗户
  
,
zhīyǒu
只有
xiē
一些
chuāngdòng
窗洞
可以
tōngfēng
通风
  

Those shabby houses had no windows but some holes for ventilation.