From antithetic + -al.
antithetical (comparative more antithetical, superlative most antithetical)
- 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.
- This is precisely why insistence on relative truth is antithetical to critical thinking.
pertaining to or being an antithesis