The noun 屋檐 (wūyán) means "eaves," referring to the edges of a roof that overhang the walls of a building. It appears in descriptions of architecture, weather-related issues, and traditional Chinese buildings. It is a common term in both written and spoken Chinese.
雨水顺着屋檐滴下来,发出好听的声音。
Yǔshuǐ shùnzhe wūyán dī xiàlái, fāchū hǎotīng de shēngyīn.
Rainwater dripped down from the eaves, making a pleasant sound.
那只小鸟在屋檐下筑了一个窝。
Nà zhī xiǎo niǎo zài wūyán xià zhù le yí gè wō.
A little bird built a nest under the eaves.
这座老房子的屋檐上长满了青苔。
Zhè zuò lǎo fángzi de wūyán shàng zhǎng mǎn le qīngtái.
The eaves of this old house are covered with moss.