絞盡腦汁 的英文怎麼說?

[1] wreck one's brain[2] at one's wit's end[3] at the end of one's rope

wreck one's brain 指絞盡腦汁，at one's wit's end 指我的智慧都用盡了還是無法處理某事情，at the end of one's rope 指江郎才盡，而當事人不想再管此事情。