Waver (verb)

1. To move or proceed with an irregular, unsteady, or uncertain motion.
2. To vacillate in opinion or action.
3. To cause to be unsteady or uncertain.

Origin:

Middle english, from old english wæfre "wavering, unstable"; related to old high german wabar "uncertain", old norse vafr "wavering".

Examples:

1. The leaves of the tree waver in the wind.
2. He wavered on whether or not to buy the car.
3. She waivered between staying and leaving the company.
4. The stock market waivered in a state of flux.
5. His decision waivered as he weighed the pros and cons.