adulteration

be worse, be deteriorated, become worse, become deteriorated, have seen better days, deteriorate, degenerate, fall off; wane (decrease); ebb; retrograde, decline, droop; go down (sink); go downhill, go from bad to worse, go farther and fare worse; jump out of the frying pan into the fire., run to seed, go to seed, run to waste, swale, sweal; lapse, be the worse for; sphacelate; break, break down; spring a leak, crack, start; shrivel (contract); fade, go off, wither, molder, rot, rankle, decay, go bad; go to decay, fall into decay; " fall into the sear and yellow leaf," rust, crumble, shake; totter, totter to its fall; perish; die., [Render less good] deteriorate; weaken; put back, set back; taint, infect, contaminate, poison, empoison, envenom, canker, corrupt, exulcerate, pollute, vitiate, inquinate; debase, embase; denaturalize, denature, leaven; deflower, debauch, defile, deprave, degrade; ulcerate; stain (dirt); discolor; alloy, adulterate, sophisticate, tamper with, prejudice., pervert, prostitute, demoralize, brutalize; render vicious., embitter, acerbate, exacerbate, aggravate., injure, impair, labefy, damage, harm, hurt, shend, scath, scathe, spoil, mar, despoil, dilapidate, waste; overrun; ravage; pillage., wound, stab, pierce, maim, lame, surbate, cripple, hough, hamstring, hit between wind and water, scotch, mangle, mutilate, disfigure, blemish, deface, warp., blight, rot; corrode, erode; wear away, wear out; gnaw, gnaw at the root of; sap, mine, undermine, shake, sap the foundations of, break up; disorganize, dismantle, dismast; destroy., damnify (aggrieve); do one's worst; knock down; deal a blow to; play havoc with, play sad havoc with, play the mischief with, play the deuce with, play the very devil with, play havoc among, play sad havoc among, play the mischief among, play the deuce among, play the very devil among; decimate.