a reduction in the value, or an impairment in the quality of something / moral corruption / an abolition or abrogation

plural of vitiation

That which vitiates.

present participle of vitiate

Third-person singular simple present indicative form of vitiate

(transitive) To spoil, make faulty; to reduce the value, quality, or effectiveness of something. / (transitive) To debase or morally corrupt. / (transitive, archaic) To violate, to rape.

simple past tense and past participle of vitiate

plural of vitiator