Synonyms and related words :
abate, answer, answer conclusively, argue down, attenuate, blunt, bugger up, confound, confute, contradict, controvert, cramp, cripple, crush, damage, damp, dampen, dash, deaden, debilitate, defeat, demolish, deny, devitalize, disable, dismiss, dispose of, drain, dull, enervate, enfeeble, eviscerate, exhaust, extenuate, finish, floor, foil, frustrate, gruel, harm, honeycomb, hurt, impair, lay low, mine, mitigate, nonplus, overset, overthrow, overturn, overwhelm, parry, put to silence, queer, rattle, rebut, reduce, reduce to silence, refute, ruin, sabotage, sap, sap the foundations, settle, shake, shake up, shut up, silence, smash all opposition, soften up, spoil, squash, squelch, subvert, threaten, throw down, throw over, thwart, unbrace, undercut, unman, unnerve, unstrengthen, unstring, upend, upset, weaken, wreck