► 動詞為す  [(1)なす]  [liter]    
meaning:  do  rank: 2☆ 
何事も為せば
成る ⇨ If you really try you can make anything happen
為す  [(1)なす]  [
為す術がない]  [liter]    
meaning:  do  rank: 2☆ 
今となっては
最早為す
術もない ⇨ At this point there is nothing you can do
More examples:- 彼の怪我は酷すぎて為す術もなかった (なすすべ) ⇨ His injuries were so bad there was no way to treat them, nothing you could do
 - 彼は為す術も無くただ立ち尽くした ⇨ He wasn’t able to do anything and just stood there