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vitiate

[vish-ee-eyt]
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verb (used with object), vi·ti·at·ed, vi·ti·at·ing.
  1. to impair the quality of; make faulty; spoil.
  2. to impair or weaken the effectiveness of.
  3. to debase; corrupt; pervert.
  4. to make legally defective or invalid; invalidate: to vitiate a claim.
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Origin of vitiate

1525–35; < Latin vitiātus, past participle of vitiāre to spoil, derivative of vitium blemish, vice1 + -ātus -ate1
Related formsvi·ti·a·tion, nounvi·ti·a·tor, nounnon·vi·ti·a·tion, nounun·vi·ti·at·ed, adjectiveun·vi·ti·at·ing, adjective
Can be confusedameliorate obviate vitiate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for non-vitiation

vitiate

verb (tr)
  1. to make faulty or imperfect
  2. to debase, pervert, or corrupt
  3. to destroy the force or legal effect of (a deed, etc)to vitiate a contract
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Derived Formsvitiable, adjectivevitiation, nounvitiator, noun

Word Origin

C16: from Latin vitiāre to injure, from vitium a fault
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 non-vitiation

vitiate

v.

1530s, from Latin vitiatus, past participle of vitiare "to make faulty, injure, spoil, corrupt," from vitium "fault, defect, blemish, crime, vice" (see vice (n.1)). Related: Vitiated; vitiating.

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Online Etymology Dictionary, © 2010 Douglas Harper