Pronunciation: (an-tag'u-nīz"), [key]
—v., -nized, -niz•ing.
1. to make hostile or unfriendly; make an enemy or antagonist of: His speech antagonized many voters.
2. to act in opposition to; oppose.
Rare.to act antagonistically. Also, esp. Brit.,an•tag'o•nise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.