agonize /ˈæɡəˌnaɪz/ (agonizing,agonized,agonizes)

• 1.  

  V-I（不及物动词） If you agonize over something, you feel very anxious about it and spend a long time thinking about it. 伤脑筋

  例：

  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。