antithetical

 
Pronunciation: /ˌantɪˈθɛtɪk(ə)l/

adjective

  • 1directly opposed or contrasted; mutually incompatible: people whose religious beliefs are antithetical to mine
  • 2connected with, containing, or using the rhetorical device of antithesis: when praising the government, Pyrocles invokes the familiar oxymoronic and antithetical mode

Derivatives

antithetic

adjective

antithetically

adverb

Origin:

late 16th century (in antithetical (sense 2)): from Greek antithetikos, from antithetos 'placed in opposition', from antitithenai 'set against'