i-adjective
beyond help; incorrigible; irredeemable
Used for a person or situation so hopeless that no amount of advice, guidance, or effort can fix it. Often carries a tone of exasperation or resignation.
彼は何度注意しても同じ失敗を繰り返す。本当に度し難い。
No matter how many times I warn him, he repeats the same mistake. He's truly beyond help.
あの政治家の腐敗ぶりは度し難い。
That politician's corruption is irredeemable.