Word: 洞穴 (dòngxué) 洞穴 dictionary entry dòngxué cave; cavern Full dictionary entry for 洞穴 Example sentences using 洞穴 2 sentences, showing page 1 of 1. 山边有一个很深的洞穴。 Shān biān yǒu yí gè hěn shēn de dòngxué. There is a very deep cave on the side of the mountain. 这地方有多少洞穴？ Zhè dìfāng yǒu duōshǎo dòngxué? How many caves are there in this area?