1. insulting, abusive, or highly critical language:"he let out a stream of invective"
Word Originlate Middle English (originally as an adjective meaning ‘reviling, abusive’): from Old French invectif, -ive, from late Latin invectivus ‘attacking’, from invehere (see inveigh). The noun is from late Latin invectiva (oratio) ‘abusive or censorious (language)’.