antithetic

UK: /ˌæntɪˈθetɪk/ US: (an′tə thet′ik)

WordReference Random House Unabridged Dictionary of American English © 2025

an•ti•thet•ic  (an′tə thet′ik), adj. 

1. of the nature of or involving antithesis.
2. directly opposed or contrasted;
   opposite.

Also, an′ti•thet′i•cal. 

• Greek antithetikós, equivalent. to anti(ti)thé(nai) to set in opposition + -tikos -tic
• 1575–85

an′ti•thet′i•cal•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

antithetical / ˌæntɪˈθɛtɪk^əl/, antithetic adjective

1. of the nature of antithesis
2. directly contrasted