tr.v. an·tag·o·nized, an·tag·o·niz·ing, an·tag·o·niz·es
1. To incur the dislike of; provoke hostility or enmity in: antagonized her officemates with her rude behavior.
2. To counteract.
[Greek antagōnizesthai, to struggle against : anti-, anti- + agōnizesthai, to struggle (from agōn, contest; see AGONY).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.