vacillate
verb /ˈvæsəleɪt/
  /ˈvæsəleɪt/
 [intransitive] (formal)Verb Forms
| present simple I / you / we / they vacillate |    /ˈvæsəleɪt/   /ˈvæsəleɪt/  | 
| he / she / it vacillates |    /ˈvæsəleɪts/   /ˈvæsəleɪts/  | 
| past simple vacillated |    /ˈvæsəleɪtɪd/   /ˈvæsəleɪtɪd/  | 
| past participle vacillated |    /ˈvæsəleɪtɪd/   /ˈvæsəleɪtɪd/  | 
| -ing form vacillating |    /ˈvæsəleɪtɪŋ/   /ˈvæsəleɪtɪŋ/  | 
- to keep changing your opinion or thoughts about something, especially in a way that annoys other people synonym waver
- The country’s leaders are still vacillating between confrontation and compromise.
 
Word Originlate 16th cent. (in the sense ‘sway unsteadily’): from Latin vacillat- ‘swayed’, from the verb vacillare.