adulterate, alloy, bargain, beat down, bid, bid for, break, canker, chaffer, coarsen, confound, contaminate, corrupt, cut, cut prices, debase, debauch, decline, decry, defile, deflate, deflower, degenerate, degrade, denature, deprave, depreciate, desecrate, despoil, devaluate, devalue, dicker, distort, dive, downgrade, drive a bargain, fall, fall in price, give way, haggle, higgle, huckster, infect, jew down, lower, mark down, misuse, negotiate, nose-dive, outbid, pare, pervert, plummet, plunge, poison, pollute, prostitute, ravage, ravish, reduce, sag, shave, slash, slump, taint, trim, twist, ulcerate, underbid, undervalue, violate, vitiate, vulgarize, warp, write down, write off