disprove

[dis-proov]
verb (used with object), disproved, disproving.
to prove (an assertion, claim, etc.) to be false or wrong; refute; invalidate: I disproved his claim.

Origin:
1350–1400; Middle English < Anglo-French, Old French desprover, equivalent to des- -dis-1 + prover to prove

disprovable, adjective
disprover, noun
undisprovable, adjective
undisproved, adjective

1. deny, disapprove, disprove, rebut, refute (see synonym study at deny) ; 2. disapprove, disprove, rebut, refute.


discredit, contradict, negate, confute.
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World English Dictionary
disprove (dɪsˈpruːv)
 
vb
(tr) to show (an assertion, claim, etc) to be incorrect
 
dis'provable
 
adj
 
dis'proval
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

disprove
c.1380, from O.Fr. desprover, from des- "dis-" + prover "to prove."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Both of these claims can and have been disproved by scientific means.
The introducer explained that my research had disproved part of my adviser's
  lifework, and the shock had killed him.
Of course such a thing is an impossibility, as if evolution could be proved or
  disproved by a single experiment.
Long after proofs have been disproved, he knew, insights remain fresh.
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