Merriam-Webster Collegiate Dictionary - invective

 I. adjective  Etymology: Middle English invectif, from Middle French, from Latin invectivus, from invectus, past participle of invehere  Date: 15th century of, relating to, or characterized by insult or abuse  • ~ly adverb  • ~ness noun  II. noun  Date: 1523  1. an abusive expression or speech  2. insulting or abusive language ; vituperation  Synonyms: see abuse