vacillate
UK: ˈvæs.ɪ.leɪt | US: ˈvæs.ə.leɪt
vi. to waver between different opinions or actions; be indecisive
vi. to sway unsteadily; fluctuate physically or emotionally
The word vacillate traces back to Latin vacillare, which vividly evokes the image of swaying or tottering, akin to a tree rocking in the wind. Over time, the physical sense of swaying extended metaphorically to describe mental hesitation or indecision. The suffix -ate standardizes it as a verb in English, preserving its core idea of instability—whether physical or psychological.
She vacillated between accepting the job offer and pursuing further studies.
The politician’s vacillating stance on the issue frustrated voters.
His mood vacillated wildly after hearing the unexpected news.
The candle flame vacillated in the drafty room.
Avoid vacillating too long; deadlines demand decisive action.