formalize, validate

negate, invalidate, annul, overturn, neutralize, rescind, disallow, thwart, abrogate, quash, scuttle, overrule, undo, voided, frustrate, deny, supersede, amend, usurp, reject, stymie, deprive, preempt, countermand, impose, circumvent, forestall, undermine, eviscerate, dismiss, disqualify, counteract, estop, derail, compel, scupper, emasculate, punish, stifle, revoke, obliterate, sidestep, alter, reverse, upheld, terminate, invoke, restrict, squelch, restrain, abolish, defang, ratify, reinstate, contravene, curtail, outflank, legitimize, enjoin, cripple, undercut, reconsider, subvert, denude, erase, defend, impeach, vitiate, enforce, gazump, redraft, oust, overawe, derogate, negatived, unsettle, assert, renegotiate, declare, justify, dissolve, suspend, banish, exonerate, disfranchise, unhinge, eliminate, condemn, penalize, legislate, accede, suppress, codify, predicating, controvert, disorganise, obviate, blunted, weaken, legitimatize, repudiate, circumscribe

break

air defense, counteraction, invalidator, neutralisation, neutralization, nullifier, voider

cancel, contradict

avoid, void