卧底 (臥底) wòdǐ

wòdǐ verb to hide (as an undercover agent); an insider (in a gang of thieves); a mole
Domain: Literary Chinese 文言文
Notes: (CC-CEDICT '臥底')

Word is mentioned most frequently in

Truncated for common words

• Scroll 8 Records of the Transmission of the Lamp 景德傳燈錄 — count: 1 , has English translation