vacillate
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/ˈvæsəleɪt/
🇬🇧
/ˈvæsəleɪt/
to keep changing your mind about something, especially in a way that can be frustrating to others
He kept vacillating about whether to take the job or not, which was starting to frustrate his colleagues.
他一直在犹豫是否接受这份工作,这开始让他的同事们感到沮丧。