Main Entry: an·tag·o·nize

Pronunciation: \an-ˈta-gə-ˌnīz\

Function: transitive verb

Inflected Form(s): an·tag·o·nized; an·tag·o·niz·ing

Etymology: Greek antagōnizesthai, from anti- + agōnizesthai to struggle, from agōn contest — more at agony

Date: circa 1742

1 : to act in opposition to : counteract
2 : to incur or provoke the hostility of <his criticism antagonized his friends>