The miserable change now at my end Lament nor sorrow at: but please your thoughts In feeding them with those my former fortunes Wherein I liv’d, the greatest prince o’ the world, The noblest; and do now not basely die, Not cowardly put off my helmet to My countryman, a Roman by a Roman Valiantly vanquish’d.
There are no more uses of "vanquish" in the play.
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The team vanquished all competition.
You need to vanquish those negative thoughts and think about good things.