falsify

[ fawl-suh-fahy ]
/ ˈfɔl sə faɪ /
|

verb (used with object), fal·si·fied, fal·si·fy·ing.

to make false or incorrect, especially so as to deceive: to falsify income-tax reports.
to alter fraudulently.
to represent falsely: He falsified the history of his family to conceal his humble origins.
to show or prove to be false; disprove: to falsify a theory.

verb (used without object), fal·si·fied, fal·si·fy·ing.

to make false statements.

Origin of falsify

1400–50; late Middle English falsifien < Middle French falsifier < Late Latin falsificāre. See false, -ify
SYNONYMS FOR falsify
1, 3 See misrepresent.
4 rebut, discredit, refute, confute, controvert.
Related forms
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for unfalsifiable

falsify

/ (ˈfɔːlsɪˌfaɪ) /

verb -fies, -fying or -fied (tr)

to make (a report, evidence, accounts, etc) false or inaccurate by alteration, esp in order to deceive
to prove false; disprove
Derived Formsfalsifiable, adjectivefalsification (ˌfɔːlsɪfɪˈkeɪʃən), nounfalsifier, noun

Word Origin for falsify

C15: from Old French falsifier, from Late Latin falsificāre, from Latin falsus false + facere to make
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 unfalsifiable

falsify


v.

mid-15c., "to prove false," from Middle French falsifier (15c.), from Late Latin falsificare (see falsify). Meaning "to make false" is from c.1500. Earlier verb was simply falsen (c.1200). Related: Falsified; falsifying.

Online Etymology Dictionary, © 2010 Douglas Harper