Agonizing decisions and choices are very difficult to make.
痛苦的 It was the most agonizing decision of her life. 这是她一生中最痛苦的决定。
This is a torturous, agonizing way to kill someone.
这是个折磨人、让人痛苦难当的杀人方法。
Perhaps he was agonizing over the moral issues involved.
或许他正在为牵涉到的道德问题伤脑筋。