counteract

I verb act in opposition to, agitate against, annul, antagonize, be at cross purposes, be contrary, bid against, cancel out, clash, collide, come in conflict with, conflict with, confute, contend, contradict, counter, counterbalance, countermand, countermine, counterpoise, countervail, counterwork, cross, deactivate, defeat, defy, destroy the effect of, disconcert, disrupt, equalize, equiponderate, fight against, find a remedy, foil, frustrate, frustrate by contrary action, go against, go in opposition to, hinder, inhibit, interfere with, make a stand against, match against, militate against, negate, neutralize, nullify, offset, oppose, oppugn, pit against, play against, play at cross purposes, prevent, protest, protest against, rebuff, repress, resist, resistere, reverse, rival, run against, run counter, run counter to, run in opposition to, set against, set at naught, side against, squelch, stand against, take issue with, take one's stand against, traverse, undo, withstand, work against II index antagonize, avert, balk, circumvent, collide (clash), compensate (counterbalance), conflict, confront (oppose), contradict, contravene, counter, countervail, demonstrate (protest), discommode, disprove, disqualify, foil, forestall, frustrate, halt, hamper, interfere, kill (defeat), negate, nullify, oppose, outbalance, override, prevent, prohibit, repulse, resist (oppose), stem (check), stop, thwart, vitiate, withstand