expression, suru verb (special)
be too late to be of use
A formal, somewhat literary set phrase meaning that an action or measure has come too late to be effective. Often used in the pattern 〜するのは遅きに失する or 〜しても遅きに失する.
今さら対策を講じても遅きに失する。
Taking measures now would be too late to be of any use.
問題がここまで大きくなってから動く
It is too late to act now that the problem has grown this big.