Syn. -- To waver; vacillate; fluctuate; hesitate; demur; scruple; question.
Doubt, v. t. 1. To question or hold questionable; to withhold assent to; to hesitate to believe, or to be inclined not to believe; to withhold confidence from; to distrust; as, I have heard the story, but I doubt the truth of it.
To admire superior sense, and doubt their own!
Pope.
I doubt not that however changed, you keep
So much of what is graceful.
Tennyson.
To doubt not but.