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disprove

[dis-proov]
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verb (used with object), dis·proved, dis·prov·ing.
  1. to prove (an assertion, claim, etc.) to be false or wrong; refute; invalidate: I disproved his claim.
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Origin of disprove

1350–1400; Middle English < Anglo-French, Old French desprover, equivalent to des- dis-1 + prover to prove
Related formsdis·prov·a·ble, adjectivedis·prov·er, nounun·dis·prov·a·ble, adjectiveun·dis·proved, adjective
Can be confuseddeny disapprove disprove rebut refute

Synonyms

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discredit, contradict, negate, confute.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for disprove

disprove

verb
  1. (tr) to show (an assertion, claim, etc) to be incorrect
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Derived Formsdisprovable, adjectivedisproval, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for disprove

v.

late 14c., from Old French desprover "refute, contradict," from des- (see dis-) + prover (see prove). Related: Disproved; disproving.

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Online Etymology Dictionary, © 2010 Douglas Harper