vitiated

From the verb vitiate: (⇒ conjugate)

vitiated is: ⓘ

v past

v past p

WordReference Random House Learner's Dictionary of American English © 2025

vi•ti•ate /ˈvɪʃiˌeɪt/   v. [~ + object] , -at•ed, -at•ing. 

1. to ruin or reduce the quality of; make faulty;
   spoil.
2. to reduce or weaken the effectiveness of:
   vitiated his best efforts.
3. Law to make (a claim) legally invalid;
   invalidate:
   to vitiate a claim.

vi•ti•a•tion /ˌvɪʃiˈeɪʃən/  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2025

vi•ti•ate  (vish′ē āt′), v.t., -at•ed, -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. Law to make legally defective or invalid;
   invalidate:
   to vitiate a claim.

• Latin vitiātus, past participle of vitiāre to spoil, der. of vitium blemish, vice¹ + -ātus -ate¹
• 1525–35

vi′ti•a ′tion, n. 
vi ′ti•a′tor, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

vitiate / ˈvɪʃɪˌeɪt/ verb (transitive)

1. to make faulty or imperfect
2. to debase, pervert, or corrupt
3. to destroy the force or legal effect of (a deed, etc)

Etymology: 16th Century: from Latin vitiāre to injure, from vitium a fault

ˌvitiˈation noun

ˈvitiˌator noun