Definition of "falsify" []

To state untruthfully; misrepresent. (verb-transitive)
To make false by altering or adding to: falsify testimony. (verb-transitive)
To counterfeit; forge: falsify a visa. (verb-transitive)
To declare or prove to be false. (verb-transitive)
To make untrue statements; lie. (verb-intransitive)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "falsify" in a sentence

"Also, as pointed out before, if we are able to find an object of sufficient mass within the Schwarzschild radius, which normally would continue to collapse into a gravitational singularity (Black Hole) but has not, that would disprove the theory of Black holes right there, or in other words falsify them."
"Instead, he argues that the logic of scientific research is a critical method in which scientists do their best to "falsify" their hypotheses and theories."
"It looks like you have addressed T&G's main arguments (eg, about the 2nd law), but I wonder if it might be appropriate to put in a brief description of what it means to "falsify" something in the scientific sense -- ie, essentially what T&G must show (and failed to show) to make their case that there is no greenhouse effect:"

Words like "falsify"

alter change by reversal confute cook counterfeit disprove

edit fake false falsehood falseness falsified

falsifier falsifies falsifying falsity forge nullify

redact reverse sophisticate turn violate