n.

1. 對立面；對立；對照；對偶；反面論述
   The antithesis to "Human nature is basically good." is "Human nature is basically bad."

   「人性本惡」就是「人性本善」的反面論述。

2. （修辭學中的）對語，對句

n.

1. a person or thing that is the direct opposite of another.
   ▸a contrast or opposition between two things.
2. a rhetorical or literary device in which an opposition or contrast of ideas is expressed.
3. (in Hegelian philosophy) the negation of the thesis as the second stage in the process of dialectical reasoning. Compare with synthesis.