vitiator

vitiate

[vish-ee-eyt]
verb (used with object), vitiated, vitiating.
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.

Origin:
1525–35; < Latin vitiātus, past participle of vitiāre to spoil, derivative of vitium blemish, vice1 + -ātus -ate1

vitiation, noun
vitiator, noun
nonvitiation, noun
unvitiated, adjective
unvitiating, adjective

ameliorate, obviate, vitiate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vitiate (ˈvɪʃɪˌeɪt)
 
vb
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
 
[C16: from Latin vitiāre to injure, from vitium a fault]
 
'vitiable
 
adj
 
viti'ation
 
n
 
'vitiator
 
n

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

vitiate
1534, from L. vitiatus, pp. of vitiare "to make faulty, injure, spoil, corrupt," from vitium "fault, defect, blemish, crime, vice" (see vice (1)).
Online Etymology Dictionary, © 2010 Douglas Harper
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