n.

1. 对立面；对立；对照；对偶；反面论述
   The antithesis to "Human nature is basically good." is "Human nature is basically bad."

   “性本恶”就是“性本善”的反面论述。

2. （修辞学中的）对语，对句

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.