Definition of vitiate:
- To cause to fail of effect, either wholly or in part; to make void; to destroy, as the validity or binding force of an instrument or transaction; to annul; as, any undue influence exerted on a jury vitiates their verdict; fraud vitiates a contract.
- To make vicious, faulty, or imperfect; to render defective; to injure the substance or qualities of; to impair; to contaminate; to spoil; as, exaggeration vitiates a style of writing; sewer gas vitiates the air.
foil, deject, buy, go bad, demoralise, recant, deflower, bobble, tarnish, cosset, thwart, rape, misguide, evacuate, void, taint, deny, lead astray, fumble, featherbed, animalize, debauch, defile, abolish, blow, impair, annul, subvert, infect, convolute, frustrate, bribe, dispirit, muff, stretch, foul up, bollix, help, flub, disserve, alloy, mishandle, bollocks up, befoul, invalidate, violate, muck up, debase, soil, bastardize, cast down, outrage, canker, ruin, clean, bumble, ball up, annihilate, bollocks, cocker, mollycoddle, bollix up, rescind, baffle, cross, detract from, pamper, quash, blemish, sabotage, indulge, negate, continue, mutilate, bring down, set aside, revoke, baby, pollute, spoil, mar, fluff, better, pervert, coddle, misuse, twist around, bestialize, itch, prejudice, cancel, botch up, harm, get down, despoil, misaddress, sully, dilute, countermine, depress, hurt, grease one's palms, empty, avoid, bodge, corrupt, deprave, profane, dismay, misdirect, brutalize, extinguish, plunder, stain, overturn, louse up, contaminate, injure, nullify, demoralize, overthrow, sophisticate, blight, mislead, abuse, cloud, bilk, bungle, flaw, counteract, damage, load, mess up.
- disable (part of speech: verb)
- pervert (part of speech: verb)
In moving the eccentric round upon the shaft, move it in the direction in which it will rotate when the engine is running forward, so as to allow for and take up any lost motion there may be in the eccentric straps, in the eccentric rod eyes and bolts, and in the other working parts of the valve gear; for if the eccentric was moved backward, all such lost motion would operate to vitiate the set of the valve.- "Modern Machine-Shop Practice, Volumes I and II", Joshua Rose.
Many other phases of exploration work may be picked up empirically by any one familiar with the local conditions; but when the man without sound geologic training attempts to go into this particular field, his lack of background and perspective often leads to fantastic hypotheses which may vitiate the inferences on which he plans his exploration.- "The Economic Aspect of Geology", C. K. Leith.
The only circumstances strong enough to vitiate a purchase, which has been reduced to a written contract, is proof of fraudulent representation as to an encumbrance of which the buyer was ignorant, or a defect in title; but every circumstance which the purchaser might have learned by careful investigation, the law presumes that he did know.- "The Book of Household Management", Mrs. Isabella Beeton.