calumniatory
/kælˈjʊmɪnətri/Definitions
1. adjective
calumniously or falsely speaking; falsely accusing or defaming
“The politician’s calumniatory remarks against his opponent sparked outrage in the community.”
2. noun
a calumnious or defamatory statement or accusation
“The newspaper printed a calumniatory article about the local business, causing them to lose customers.”