His tendency to vacillate makes him a poor leader.
She has a tendency to vacillate.
I always vacillate when I have to choose between curly or straight fries.
Yes. People who vacillate are often poor leaders.
She'll vacillate between the two options and have difficulty making a decision.
Vacillate - to waver in opinion or mind; be indecisive or irresoluteSentence:Her mood vacillated between hope and despair.
I want to make up my mind but I vacillate between my decisions.
vacillate:
My sister is very vacillating; she takes a long time to decide what she wants to wear.
Stabilize is the opposite of fluctuate, vary, adjust, and vacillate.
Three
vacillate "It's not unusual to vacillate about the 'good's and 'bad's of such a big decision"
(from the stringed toy, to vacillate, or alternately a dull-witted person) "My yo-yo became stuck in the bus door." "The driver must have thought I was a real yo-yo." "The candidate was known to yo-yo on critical issues."