Correct

垮塌

/ kuǎ tā / 
Strokes

Definition

to collapse (of building, dam or bridge)

Example

As a Verb

collapse

1
Dàqiáo
大桥
de
的
kuǎtā
垮塌
shìgù
事故
zhènjīng
震惊
le
了
quánguó
全国
  
。

The collapse of the bridge shocked the whole country.