Definitions:

1. Describes inability to take a definite stance, opting to frequently change one's mind or display uncertainty. ADJECTIVE
   • Her vacillating decisions made it difficult for the team to move forward with the project.
2. Describes someone or something that is wavering, indecisive, or fluctuating between different opinions, actions, or positions. ADJECTIVE
   • The speech was vacillating.
   • The vacillating weather made it impossible to plan outdoor activities.

Synonyms:

• ambivalent
• faltering
• irresolute
• uncertain
• undecided
• unsure
• vacillant
• wobbly