Vanquish Defined

To win a victory over, as in battle or a competition: beat, best, conquer, defeat, master, overcome, prevail against or over, rout, subdue, subjugate, surmount, triumph over, worst. Informal: trim, whip. Slang: ace, lick. Idioms: carry (or win) the day, get (or have) the best of, get (or have) the better of, go someone one better.