vac·il·late /ˈvæsəleɪt/ verb [intransitiveI] formal CHANGE YOUR MINDto continue to change your opinions, decisions, ideas etc 犹豫,踌躇,拿不定主意 SYN wavervacillate between Her parents vacillated between different approaches to discipline. 她的父母在不同的管教方式之间摇摆不定。
—vacillation /ˌvæsəˈleɪʃən/ noun [countableC, uncountableU]