vacillation
🇺🇸
/ˌvæsəˈleɪʃn/
🇬🇧
/ˌvæsəˈleɪʃn/
When you keep changing your mind about something.
His vacillation on the decision made everyone frustrated.
他在決定上的搖擺不定讓每個人都感到沮喪。