It had been gradually yielding to the better hopes which her looks, or words, or actions occasionally encouraged; it had been vanquished at last by those sentiments and those tones which had reached him while she talked with Captain Harville; and under the irresistible governance of which he had seized a sheet of paper, and poured out his feelings.
There are no more uses of "vanquish" in the book.
Show samples from other sources
The team vanquished all competition.
You need to vanquish those negative thoughts and think about good things.