an⋅ti⋅thet⋅ic

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

an⋅tith⋅e⋅sis

- noun
1. opposition; contrast.
2. the direct opposite.
3. a. the placing of a sentence or one of its parts against another to which it is opposed to form a balanced contrast of ideas.
b. the second sentence or part thus set in opposition.