antithetical

Meanings

1. 1
   adj

   sharply contrasted in character or purpose

   The lawyer had clients with practices entirely antithetical to their personal beliefs.

2. 2
   adj

   Pertaining to antithesis, or opposition of words and sentiments; containing, or of the nature of, antithesis; contrasted.

   His wrong-headed beliefs are antithetical to everything we stand for as a community.

Etymology

From Latin antitheticus + -al.