家贼难防

Chinese

For pronunciation and definitions of 家贼难防 – see 家賊難防 (“it is difficult to guard against a thief within one's house; bad people from within are the most difficult to guard against”). (This term is the simplified form of 家賊難防).

Notes: Simplified Chinese is mainly used in Mainland China, Malaysia, and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.