Third-person singular simple present indicative form of prevent.(verb)
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Use "prevents" in a sentence
"The use of this term prevents the need for label changes."
"In Portland, it seems, the need for the positive spin prevents news men and women from ascertaining the nature of Portland politics, viz. a machine with groomed puppets waiting in the wings."
"Natural evil is also justified because it punishes the wicked, and since Original Sin prevents human virtue, all of humanity is wicked, thus all of humanity suffers."