antithetical

(adjective)

adjective

1. sharply contrasted in character or purpose

- practices entirely antithetical to her professed beliefs

- hope is antithetic to despair

Similar word(s): different, antithetic

Sentences with antithetical as an adjective:

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

- This is precisely why insistence on relative truth is antithetical to critical thinking.