刀槍不入 [ㄉㄠ ㄑㄧㄤ ㄅㄨˋ ㄖㄨˋ; dao1 qiang1 bu4 ru4] lit. impervious to sword or spear (idiom) fig. invulnerable untouchable thick-skinned impervious to criticism ◄ ►