Select the most appropriate synonym of the given word. Vacillate

The most appropriate synonym of the word vacillate is waver.

• Vacillate means "to show irresolution or uncertainty; to hesitate or waver in mind or opinion."
• Augment means "to make greater or larger."
• Strengthen means "to make stronger or more powerful."
• Fortify means "to make strong or secure, especially against attack."