Correct

天窗

/ tiānchuāng / 
Strokes

Definition

hatchway/skylight/sun roof

Example

As a Noun

skylight; dormer window

1
Dǎkāitiānchuāngshuōliànghuà
打开天窗说亮话
  
。

Let's be frank. / Let's call a spade a spade.

As a Noun

blank left in a newspaper after sth has been deleted