ostracize, exclude, shun, spurn, cold-shoulder, give someone the cold shoulder, reject, repudiate, boycott, blackball, blacklist, cast off, cast out, shut out, avoid, ignore, snub, cut dead, keep at arm's length, leave out in the cold, bar, ban, debar, banish, exile, expel
avoid, evade, eschew, steer clear of, shy away from, fight shy of, recoil from, keep away from, keep one's distance from, give a wide berth to, have nothing to do with, leave alone, not touch