"cannot overcome" is "넘사벽"(nŏm-sa-byŏk) in Korean.
The "cannot overcome" is called as 넘사벽 in Korea.
The Neom sa byeok (넘사벽), stands for literally meaning of “Unclimbable wall” As if there is a wall invisible, refers to a state in which ability is not exceeded even much efforts have done. Means " Never exceeds wall" and " It’s couldn't have been to compare ", and is used when the difference is too large.