v. 25B6; verb
he may quash the sentence : CANCEL, reverse, rescind, repeal, revoke, retract, countermand, withdraw, overturn, overrule, veto, annul, nullify, invalidate, negate, void; Law vacate; formal abrogate.
we want to quash these rumours : PUT AN END TO, put a stop to, stamp out, crush, put down, check, curb, nip in the bud, squash, quell, subdue, suppress, extinguish, stifle; informal squelch, put the kibosh on.
validate.