1. to waver between different opinions or courses of action; to be indecisive
Usage: third person singular present tense of ‘vacillate’

Examples

• She vacillates between studying medicine and pursuing art.
• The politician vacillates on key issues depending on the audience.
• He vacillates so much that his friends never know what he really thinks.
• The stock market vacillates wildly during uncertain economic times.
• Sarah vacillates between confidence and self-doubt before big presentations.
• The committee vacillates on the budget proposal week after week.