Mrs. Penniman, faltering and wavering, declared Catherine was very stupid, put off the great scene, as she would have called it, from day to day, and wandered about very uncomfortably, primed, to repletion, with her apology, but unable to bring it to the light.
There are no more uses of "waver" in the book.
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Through good times and bad her love for him has never wavered.
We are looking for someone who won’t waver when things get tough.