Correct

凭险

/ píngxiǎn /
Strokes

Definition

(to resist the enemy) relying on inaccessible territory

Example

As a Verb

rely on natural barriers

1
Píng
xiǎn
shǒu
据守

hold fast to natural barriers as defences

2
Píng
xiǎn
kàng
抵抗

resist by making use of natural barriers; defend by taking advantage of favourable terrain