adj.不能挽回的；不能取消的；不能变更的
The doom which I have passed upon her is irrevocable. 我对她下的判决是不能挽回的。
We ask you to use an irrevocable letter of credit. 我们要求您们开一张不可撤销的信用状。
The decision has been made and is irrevocable. 木已成舟已作出决定，无法反悔
His life was set on an irrevocable course. 他的生活道路不可改变。
