Correct

牢靠

/ láokào /
Strokes

Definition

firm and solid/robust/reliable

Example

As an Adjective

firm; strong; sturdy; steady

1
Zhè
shūjià
书架
gòu
不够
láokào
牢靠
  
,
kuài
sǎnjià
散架
le
  

The bookshelf is not strong enough. It's going to break.

2
zi
梯子
fàng
láokào
牢靠
xiē

fix the ladder steadily

As an Adjective

safe; dependable; reliable

3
Pài
bàn
zhè
jiàn
shìqing
事情
jiào
比较
láokào
牢靠
  

It's relatively safer to send him to handle the affairs.

4
Bànshì
办事
láokào
牢靠

dependable/reliable in handling matters