Same word as xout:

X-out, abolish, abort, abrogate, annul, ax, black out, blot out, break, break off, countermand, cross out, cut, deface, delete, destroy, do away with, do in, efface, eliminate, eradicate, expunge, finish off, go back on one's word, kill, obliterate, off, omit, quash, remove, render invalid, repeal, repudiate, rescind, revoke, rub out, scratch out, scrub, sink, smash, squash, stamp across, strike out, torpedo, total, trash, trim, undo, wash out, wipe out, wipe slate clean, zap