If someone vitiates something, they make it less effective, weaker, or reduced in quality.
Vituperative remarks are full of hate, anger, and cruel criticism.
A vicious person is corrupt, violent, aggressive, and/or highly immoral.
impaired by diminution
nullification by the destruction of the legal force
spread negative information about
abusive or venomous language used to express blame or censure or bitter deep-seated ill will
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