Cheapen

Verb

 * 1)  to decrease the value of; to make cheap
 * 2)  to make vulgar
 * 3)  to become cheaper

Thesaurus
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