Correct

打掩护

/ dá yǎnhù / 
Strokes

Example

As a Verb

provide cover for; shield

1
Nǐmen
你们
liú
留
zài
在
zhèlǐ
这里
dáyǎnhù
打掩护
  
。

You stay here to provide cover for us.

As a Verb

cover up

2
Shíqíng
实情
wǒmen
我们
yǐjīng
已经
dōu
都
zhīdào
知道
le
了
  
,
nǐ
你
yòngbuzháo
用不着
dáyǎnhù
打掩护
le
了
  
。

We've found out the truth. It's no use trying to cover it up any more.