adjective

1. Acting against or in opposition: adversarial, adverse, antagonistic, antipathetic, opposed, oppositional. See support/oppose.
2. Diametrically opposed: antipodal, antipodean, antithetical, antonymic, antonymous, contradictory, contrary, converse², counter, diametric, diametrical, opposite, polar, reverse. See support/oppose.

Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.