Correct

固守

/ gùshǒu / 
Strokes

Definition

to strongly defend one's position/to be entrenched/to cling to

Example

As a Verb

defend tenaciously; be strongly entrenched

1
Bùduì
部队
gùshǒu
固守
zhèndì
阵地
  
。

The troops were strongly entrenched in their position.

2
Gùshǒu
固守
gǎngwèi
岗位

stand fast at one's post; stick/keep to one's post

3
Gùshǒu
固守
dāiyuán
待援

hold until reinforcements arrive

As a Verb

stubbornly stick to; cling to

4
Gùshǒu
固守
jiùxí
旧习

stick to old customs