臥底 Save Sign in to save words Simplified: 卧底 wòdǐ ㄨㄛˋ ㄉㄧˇ to hide (as an undercover agent) an insider (in a gang of thieves) a mole Character by character 臥(wò)lie 底(dǐ)bottom A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0