家贼 jiāzéi thief within a family Origin Definitions Defs Strokes Stroke Words Sentences Sents 家贼难防 jiāzéinánfáng hard to guard against an inside thief it is difficult to protect oneself against an enemy or thief from within one's own circle; refers to a traitor or internal threat who is hard to detect老家贼 lǎojiāzéi sparrow (dialect) sparrow