antagonistic

[an-tag-uh-nis-tik] /ænˌtæg əˈnɪs tɪk/

adjective

acting in opposition; opposing, especially mutually.

hostile; unfriendly.

Origin

1625-35; antagonist + -ic

Related forms

antagonistically, adverb

nonantagonistic, adjective

nonantagonistically, adverb

Examples from the web for antagonistic

So this ends up in pure antagonistic mudslinging and trash talk rather than a discussion of merit and substance.
Space-time and matter are mutually antagonistic.
Lots of good comments, antagonistic ones aside.
He was built like a rock and often antagonistic toward me.
Broadcasting should encourage conflicting opinions and antagonistic points of view.
Public order and private liberty, he held, are non-antagonistic.
As for businessmen, many are quietly antagonistic to the idea.
The discipline and the mutual respect are complementary, not antagonistic.
But they are in a tough position because of her antagonistic attitude.
Jackson is assertive, she is not antagonistic.

British Dictionary definitions for antagonistic

/ænˌtæɡəˈnɪstɪk/

adjective

in active opposition

mutually opposed

Derived Forms

antagonistically, adverb

Word Origin and History for antagonistic

adj.

1630s, from antagonist + -ic. Related: Antagonistical (1620s); antagonistically.