As he now leaned back in his chair, and bent his deep-set eyes upon her in his turn, perhaps he might have seen one wavering moment in her, when she was impelled to throw herself upon his breast, and give him the pent-up confidences of her heart.
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.