indecisive表示没决断力的,犹豫不决的;它的反意词则是decisive,表示坚决的,果断的。
Mary is very indecisive, she cannot make decisions very quickly.
玛丽是很犹豫不决的,她不可以非常快地作出决定。
A decisive person is needed to deal with the situation.
应对这一局面需要一个坚决果断的人。
She handles affairs in a decisive manner.
她办事果断。