https://www.merriam-webster.com/dictionary/vitiate
Definition of vitiate
transitive verb
1: to make faulty or defective : IMPAIR
the comic impact is vitiated by obvious haste
— William Styron
2: to debase in moral or aesthetic status
a mind vitiated by prejudice
3: to make ineffective
fraud vitiates a contract
https://legal-dictionary.thefreedictionary.com/vitiate
Vitiate
To impair or make void; to destroy or annul, either completely or partially, the force and effect of an act or instrument.
Mutual mistake or Fraud, for example, might vitiate a contract.
West’s Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.
vitiate to destroy the force or legal effect of, for example, a deed.
Collins Dictionary of Law © W.J. Stewart, 2006
Thanks, LJ!
:)