Verb (used with object), : to vitiate a claim.    From Dictionary.com. 

I have called vitiated air (§ 29), with 4 parts of our fire-air, and placed the bottle, inverted and open, in a vessel which was also filled with a solution of liver of sulphur.    From Wordnik.com.  [Discovery of Oxygen, Part 2] Reference

Swaraj noted that the atmosphere was "vitiated" and therefore the leaders thought that it was "inappropriate" to attend the lunch.    From Wordnik.com.  [Top Headlines] Reference

"vitiated" because, shortly after the provision was enacted, the Supreme Court held in.    From Wordnik.com.  [Simple Justice] Reference

My whole nervous system has been distressed and vitiated.    From Wordnik.com.  [Study and Stimulants; Or, the Use of Intoxicants and Narcotics in Relation to Intellectual Life] Reference

The escape of the vitiated air requires less consideration.    From Wordnik.com.  [Notes and Queries, Number 236, May 6, 1854 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc] Reference

Every part of a vitiated public mind is exposed in its turn.    From Wordnik.com.  [Museum of Antiquity A Description of Ancient Life] Reference

"You can feel that the air in here is vitiated; can't you?" demanded.    From Wordnik.com.  [On a Torn-Away World Or, the Captives of the Great Earthquake] Reference

Now two persons cannot sit an hour in one room before the air becomes vitiated.    From Wordnik.com.  [Girls and Women] Reference

The air thus already vitiated, after it leaves the mouth, putrefies very rapidly.    From Wordnik.com.  [A Practical Physiology] Reference

Let us now go on to consider what ill effects result from the breathing of vitiated air.    From Wordnik.com.  [The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken] Reference

It may be said that this picture is overcharged; that no vitiated mind could have thus felt.    From Wordnik.com.  [A Love Story] Reference

The escape of the vitiated air might then take place -- if not prevented by a counter-current.    From Wordnik.com.  [Notes and Queries, Number 236, May 6, 1854 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc] Reference

As this is vitiated by its stay in the lung, it does harm rather than good by its presence.    From Wordnik.com.  [Bird Stories] Reference

The vitiated air might rise above the apertures, and so accumulate without the means of escape.    From Wordnik.com.  [Notes and Queries, Number 236, May 6, 1854 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc] Reference

Of those whose reason is sound and perfect? or of those whose reason is vitiated and corrupted?.    From Wordnik.com.  [Meditations] Reference

The results are, however, vitiated by the effects of capillarity in the interior of the vessel.    From Wordnik.com.  [Scientific American Supplement, No. 1082, September 26, 1896] Reference

The peril is, that all temporary applause is vitiated by uncertainty, and may be leading you right or wrong.    From Wordnik.com.  [The Atlantic Monthly, Volume 20, No. 122, December, 1867] Reference

That he should have become saddened by domestic losses and somewhat vitiated by flattery were, perhaps, inevitable.    From Wordnik.com.  [The Old Coast Road From Boston to Plymouth] Reference

The current of air introduced should be constant, otherwise the balance may occasionally be in favor of vitiated air.    From Wordnik.com.  [A Practical Physiology] Reference

Political activity may be national in scope, but if it is vitiated by corrupt practices its value is greatly diminished.    From Wordnik.com.  [Society Its Origin and Development] Reference

This tendency on the west the Common effectually vitiated, and the firemen's plan of campaign was proportionately simplified.    From Wordnik.com.  [White Ashes] Reference

It may be possible that the taste of the English school, and of our English collectors, may have become to a degree vitiated.    From Wordnik.com.  [Blackwood's Edinburgh Magazine, Volume 62, Number 385. November, 1847.] Reference

The rules of the company declared that in such cases the policy was vitiated, but the clause was not inserted in the instrument.    From Wordnik.com.  [The Atlantic Monthly, Volume 18, No. 107, September, 1866] Reference

Experiments which would have taken months and their results vitiated by unknown changes, can now be carried out in a few minutes.    From Wordnik.com.  [Sir Jagadis Chunder Bose His Life and Speeches] Reference

Looking for the cause of this frightful mortality, he thought he found it in a foul and vitiated state of the air of the hospital.    From Wordnik.com.  [Parks for the People Proceedings of a Public Meeting held at Faneuil Hall, June 7, 1876] Reference

He can then openly dispose of it in the grate or the waste-paper-basket on the ground that the dog's nose has vitiated its freshness.    From Wordnik.com.  [Punch, or the London Charivari, Vol. 147, July 29, 1914] Reference

As the result of this contamination, the secretions become vitiated, and a general disturbance of the conditions of life is produced.    From Wordnik.com.  [Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis] Reference

It has also been supposed that the city, with its crowded quarters, vitiated air, and communicable diseases, has a much larger death-rate.    From Wordnik.com.  [Society Its Origin and Development] Reference

I remember our third and last night in that dug-out, because the air below had got so vitiated that candles would only burn with the feeblest of glimmers.    From Wordnik.com.  [Pushed and the Return Push] Reference

Provençal nor Maritime, -- rather a product of that Italian taste which has so profoundly vitiated both the morals and the architecture of all the Riviera.    From Wordnik.com.  [Cathedrals and Cloisters of the South of France, Volume 1] Reference

He reigned for some years with great applause; but being vitiated by Cardinal Woolsey, luxury and cruelty obscured his virtues, and stained his former glory.    From Wordnik.com.  [A Museum for Young Gentlemen and Ladies Or, a Private Tutor for Little Masters and Misses] Reference

We live in the world and follow the ways of the world, until our faculties are blunted, our natures demoralised, our tastes vitiated, our energies enfeebled.    From Wordnik.com.  [The Mystery of a Turkish Bath] Reference

Their heads are filled with "sawdust," in other words, a brain of poor quality, supported by a feeble body, or vitiated by excessive temperamental conditions.    From Wordnik.com.  [How to Become Rich A Treatise on Phrenology, Choice of Professions and Matrimony] Reference

Indeed, the panel of Presbyterians finds that marriage itself, though sometimes liberating, is too often vitiated by "patriarchalism" and "heterosexist" assumptions.    From Wordnik.com.  [Roll Over John Calvin] Reference

"By golly, I've got to finish this thing quick!" he thought vaguely, for the roaring in his ears had increased, and it was hard to fill his lungs with the vitiated air.    From Wordnik.com.  [The Pirate Shark] Reference

The fatal effect of living in vitiated air is especially marked in the mortality among infants and children living in the squalid and overcrowded sections of our great cities.    From Wordnik.com.  [A Practical Physiology] Reference

Then he felt a little wave of pure air sweep around his face and heard the pumps begin to click again up above; until then he had not realized that his air was becoming vitiated.    From Wordnik.com.  [The Pirate Shark] Reference