ˊㄐㄧㄢㄅㄨˋㄘㄨㄟwújiān‑bùcuī

无坚不摧
  1. 沒有什麼堅固東西不能摧毀形容力量十分強大攻無不克 團結一心無堅不摧」。

no stronghold one cannot overcome (idiom)​; to conquer every obstacle, nothing one can't do, to carry everything before one