mountainous

这条路在山脉之间延伸。

The road extends into the ___mountainous landscape.

他面对着一座堆积如山的待洗衣物。

He was confronted with a ___mountainous pile of laundry to wash.

这个国家北部地区多山，风景非常壮丽。

The northern part of this country is very ___mountainous and has breathtaking scenery.