(noun), from Middle English
"invectif", or Old French
and Late Latin
"invectus", is an abusive, reproachful or venomous language used to express blame or censure; also, a rude expression or discourse intended to offend or hurt. Vituperation, or deeply-seated ill will, vitriol. Also: Invectivus, scolding.
The genre of invective
The "genre of invective" or "invective (genre)" is a form of classical libel used in Greek and Roman polemical verse. The preferred literary term for invective of the Renaissance is libel.