Word: 家贼难防 (jiāzéinánfáng) Traditional: 家賊難防 Example sentences using 家贼难防 2 sentences, showing page 1 of 1. 千防万防，家贼难防 qiān fáng wàn fáng, jiāzéinánfáng guard a thousand ways, a thief in the family is hard to guard against 家贼难防，外鬼难抓 jiāzéinánfáng, wài guǐ nán zhuā a thief in the house is hard to guard against, an outside ghost is hard to catch