Air cleaners becloud the effort.    From LearnThat.org.  [http://www.post-gazette.com/healthscience/20000313smoke1.asp]

Verb (used with object) : Angry words beclouded the issue.    From Dictionary.com. 

These only becloud, they do not help to point the way of safety and honor.    From Wordnik.com.  [US Presidential Inaugural Addresses] Reference

Let neither despondency nor despair becloud the serenity of thy life or restrain thy freedom.    From Wordnik.com.  [Bahíyyih Khánum] Reference

No amount of legalistic argument can becloud this issue in the eyes of these ten million American citizens.    From Wordnik.com.  [State of the Union Address (1790-2001)] Reference

The room swam—a swirling fog of inky blackness began to becloud my vision—my consciousness commenced to dim.    From Wordnik.com.  [Nevermore] Reference

He said the leaders ". allowed greed to becloud their sense of reasoning, an act common to most African leaders.".    From Wordnik.com.  [CNN Transcript Dec 17, 2005] Reference

His sensitiveness enables him to see this "more of truth," even if it becloud his vision occasionally with mundane perversions.    From Wordnik.com.  [Spirit and Music] Reference

This decision made both Northern and Southern agents anxious and the latter took steps further to becloud the status of the Rams.    From Wordnik.com.  [Great Britain and the American Civil War] Reference

Formerly Palestinian neighborhoods were even given Hebrew nationalistic names in order to becloud any memory of their pre-1948 residents.    From Wordnik.com.  [Michal Lewin-Epstein: Jerusalem Day: The Invisible and the Divisible] Reference

The judge said righteous anger should not becloud judgment but the need to emphasise the sanctity of human life might require a severe punishment.    From Wordnik.com.  [ANC Daily News Briefing] Reference

We were quite close but that did not becloud my sense of judgment.    From Wordnik.com. Reference

This would not weaken their force nor becloud the truth they reveal.    From Wordnik.com.  [Afro-American Encyclopaedia; or, The Thoughts, Doings, and Sayings of the Race, Embracing Addresses, Lectures, Biographical Sketches, Sermons, Poems, Names of Universities, Colleges, Seminaries, Newspapers, Books, and a History of the Denominations, Giving the Numerical Strength of Each. In Fact, It Teaches Every Subject of Interest to the Colored People, as Discussed by More than One Hundred of Their Wisest and Best Men and Women.] Reference

Thine eye is My trust, suffer not the dust of vain desires to becloud its luster.    From Wordnik.com.  [Gleanings from the Writings of Bahá'u'lláh] Reference

So far as known, these facts did not becloud his reputation nor interfere with his work.    From Wordnik.com.  [John Jasper: The Unmatched Negro Philosopher and Preacher] Reference

The effect of such talk, naturally, is to becloud the point at issue and confuse the mind.    From Wordnik.com.  [Heart and Soul by Maveric Post] Reference

That is simply a trick by which the counsel for the Defense has sought to becloud the issue.    From Wordnik.com.  [The Case of the Sleepwalker's Niece]

You have seen the cuttle fish attempt to becloud the water and elude the grasp of his pursuer.    From Wordnik.com.  [A Report of the Debates and Proceedings in the Secret Sessions of the Conference Convention For Proposing Amendments to the Constitution of the United States, Held at Washington, D.C., in February, A.D. 1861] Reference

It must be remembered that the mores sometimes becloud the judgment, but they more often guide it.    From Wordnik.com.  [Folkways A Study of the Sociological Importance of Usages, Manners, Customs, Mores, and Morals] Reference

United States as to becloud rather than illuminate whoever seeks to know what American law really is.    From Wordnik.com.  [The American Judiciary] Reference

International copyright must becloud this sun and bring on the former darkness and dime novel reading.    From Wordnik.com.  [Mark Twain, a Biography — Volume II, Part 1: 1886-1900] Reference

Where he could not elucidate a point to his own advantage, he would fatally becloud it for his opponent.    From Wordnik.com.  [The Every-day Life of Abraham Lincoln A Narrative And Descriptive Biography With Pen-Pictures And Personal Recollections By Those Who Knew Him] Reference

"Not a cent!" she repeated, lifting her head in mockery of his clumsy attempt to becloud the real issue.    From Wordnik.com.  [Otherwise Phyllis] Reference

But these fine words with which we fumigate and becloud unpleasant facts are not the language in which we think.    From Wordnik.com.  [Daniel Deronda] Reference

But her newly acquired status as world leader will not becloud Okagbare's vision for success at the next Olympics.    From Wordnik.com.  [AllAfrica News: Latest] Reference

Economic interests have doubtless tended to becloud the vision of the students, their parents, and the institutions also.    From Wordnik.com.  [Undergraduate Work and the University of North Carolina] Reference

This belief tends to becloud our apprehension of the kingdom of heaven and of the reign of harmony in the Science of being.    From Wordnik.com.  [Science and Health, with Key to the Scriptures] Reference

But though he turned very swiftly, and had had no brandy since morning to becloud his vision, he failed to see his tormentor.    From Wordnik.com.  [Guns of the Gods]

Among them, these four managed to becloud the vision of central bankers quite completely in the exigencies of the American inflation.    From Wordnik.com.  [Mises Dailies] Reference

Perhaps domestic sorrow, or domestic straits and care, may have come in to becloud his spirit and to make his energies for a season flag.    From Wordnik.com.  [To My Younger Brethren Chapters on Pastoral Life and Work] Reference

To repel the calumnies invented to becloud our action, we venture to address the successors of the belligerents who once appealed to Ireland.    From Wordnik.com.  [Ulster's Stand For Union] Reference

The result is to becloud reality, obstructing the possibility of achieving a clear, honest understanding of what and whom we are fighting, and why.    From Wordnik.com. Reference

A sickening doubt seemed to becloud the ill-concealed hope of our ruin.    From Wordnik.com.  [Twenty Years of Congress, Vol. 1 (of 2) From Lincoln to Garfield, with a Review of the Events Which Led to the Political Revolution of 1860] Reference

A point to his own advantage, he would fatally becloud it for his opponent.    From Wordnik.com.  [Twenty Years of Congress, Vol. 1 (of 2) From Lincoln to Garfield, with a Review of the Events Which Led to the Political Revolution of 1860] Reference