Merriam and Webster - Vacillate

Vacillate 

1: to sway through lack of equilibrium b : fluctuate, oscillate

2: to waver in mind, will, or feeling : hesitate in choice of opinions or courses 

I credit my parents - especially my mother- with my unwavering love of language. Because of my love affair with words, sometimes I get stuck on one or another.  

Lately, vacillate keeps trying to beat me up and steal my lunch money.