vitiate

[ vish-ee-eyt ]
/ ˈvɪʃ iˌeɪt /

verb (used with object), vi·ti·at·ed, vi·ti·at·ing.

to impair the quality of; make faulty; spoil.
to impair or weaken the effectiveness of.
to debase; corrupt; pervert.
to make legally defective or invalid; invalidate: to vitiate a claim.

Origin of vitiate

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

Related forms

Can be confused

ameliorate obviate vitiate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for vitiation

British Dictionary definitions for vitiation

vitiate

/ (ˈvɪʃɪˌeɪt) /

verb (tr)

to make faulty or imperfect
to debase, pervert, or corrupt
to destroy the force or legal effect of (a deed, etc)to vitiate a contract

Derived Forms

vitiable, adjectivevitiation, nounvitiator, noun

Word Origin for vitiate

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

Medicine definitions for vitiation

vitiation

[ vĭsh′ē-āshən ]

n.

A change in a process that impairs utility or reduces efficiency.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.