悬崖 (xuányá) means "cliff" or "precipice," referring to a steep, vertical rock face. It is often used both literally in descriptions of landscapes and figuratively in expressions like 悬崖勒马 (to rein in at the edge of a cliff, meaning to pull back from danger).
站在悬崖上往下看,真是让人腿软。
Zhàn zài xuányá shàng wǎng xià kàn, zhēnshi ràng rén tuǐ ruǎn.
Standing on the cliff and looking down really makes your legs go weak.
那只山羊竟然站在悬崖边上吃草。
Nà zhī shānyáng jìngrán zhàn zài xuányá biān shàng chī cǎo.
That goat was actually standing on the edge of the cliff eating grass.
这条路沿着悬崖修建,风景非常壮观。
Zhè tiáo lù yánzhe xuányá xiūjiàn, fēngjǐng fēicháng zhuàngguān.
This road was built along the cliff, and the scenery is very spectacular.