waver

n. 动摇,踌躇
v. 摆动,摇曳,犹豫

The disaster caused him to waver in his faith.

这件灾难使他对信仰发生了动摇。

While we were wavering, somebody else bought the house.

就在我们犹豫不决的时候, 别人把那所房子买下了.