Adjective: vacillating 'va-su,ley-ting
- Uncertain in purpose or action
"His vacillating attitude made it difficult for others to rely on him";
- vacillant, wavering
- Be undecided about something; waver between conflicting positions or courses of action
"He vacillates between accepting the new position and retirement";
- hover, vibrate, oscillate, blow hot and cold [informal]
- Move or sway in a rising and falling or wavelike pattern
"the line on the monitor vacillated";
- fluctuate, waver
See also: irresolute
Type of: balk, baulk [Brit], hesitate, swing, waffle [N. Amer, informal], waver