jiā zéi nán fáng
家贼难防
词语解释
家贼难防 [jiā zéi nán fáng]
1 家属或内部的人作弊营私难以防范。
英 thief in the family is difficult to detect; a thief from within is hard to guard against; it is difficult to forestall a thief within the house;
引证解释
1 家庭内部的贼人或内奸最难防范。