艰险 (jiān xiǎn): difficult and dangerous; hardships and perils

This mountain path was steep and slippery, extremely difficult and dangerous, and we had to slow down and support each other as we inched forward.

Geological survey team members work in the field all year round; even when they encounter the most difficult and dangerous conditions, they never back down.

During the Red Army's Long March, they went through countless hardships and dangers along the way and finally reached northern Shaanxi in victory.

The route to climb Mount Everest is extremely difficult and dangerous; climbers must be fully prepared to deal with dangers that can arise at any moment.

On the difficult and dangerous road of starting a business, he came close to bankruptcy several times, but with firm faith and hard work, he finally succeeded.