Correct

把牢

/ bǎ láo / 
Strokes

Example

As an Adjective

steady; reliable; dependable

1
Tā
他
shuōhuà
说话
bù
不
bǎ
把
láo
牢
  
。

You can never trust his words. / He never keeps his word.

2
Zhè
这
qiáng
墙
bù
不
bǎ
把
láo
牢
  
。

The wall is not safe.

3
Tā
她
bànshì
办事
bù
不
bǎ
把
láo
牢
  
。

She is not quite dependable in taking charge of things.