quell
verb
1 troops were called in to quell the unrest:
put an end to, stamp out, put a stop to, end, finish, get rid of, crush, put down, check, crack down on, curb, nip in the bud, thwart, frustrate, squash, quash, subdue, suppress, repress, quench, extinguish, stifle, abolish, terminate, beat, overcome, defeat, rout, destroy, demolish, annihilate, wipe out, extirpate;
informal squelch, put the kibosh on, clobber.
▷antonyms bring about, prompt.
quell Oxford Dictionary of English