v .
to be indecisive ; to waver 우유부단하게 굴다 ; 동요하다

• We invited James to spend Thanksgiving with us, but he vacillated for so long about whether he would be able to come that we finally became annoyed and disinvited him.
• Tyler vacillated about buying a new car. He couldn't decide whether to get or not.
• 우유부단한 행동을 가리키는 명사는 vacillation