Verb destroy, defeat
Synonyms: annihilate, beat, crush, extinguish, extirpate, overcome, overthrow, put down, quell, quench, repress, scrunch, snow under, squash, squish, subdue, suppress, trash
Antonyms: aid, assist, help, rebuild
Verb nullify, cancel
Synonyms: abrogate, annul, black out, bottle up, clamp down on, cork up, crack down on, declare null and void, discharge, dissolve, hush up, invalidate, kill, negate, overrule, overthrow, put damper on, put the lid on, repeal, rescind, reverse, revoke, set aside, shut down, squelch, undo, vacate, veto, vitiate, void, watergate
Antonyms: allow, permit, sanction, start, support