agonize over/about something
phrasal verb with agonize verb (UK usually agonise) uk/ˈæɡ.ə.naɪz/ us/ˈæɡ.ə.naɪz/
为…伤脑筋;对…犹疑不定;因…痛苦彷徨
If you agonize over/about something, you spend time worrying and trying to make a decision about it.
She agonized for days about whether she should take the job. 几天来她为是否该接受这份工作大伤脑筋。