imprecation

nouns

the act of calling down a curse that invokes evil (and usually serves as an insult)
"he suffered the imprecations of the mob"
imprecation, malediction
is derived from
imprecate
a slanderous accusation
imprecation
is a type of (narrower)
a formal charge of wrongdoing brought against a person; the act of imputing blame or guilt
accusal, accusation