Re-assert is a verb that means to state or declare again or to confirm the validity of something that had previously been stated. Its antonyms, on the other hand, are words that are opposite in meaning. The antonyms for re-assert include words such as deny, refute, challenge, question, and disprove. When we deny something, we are saying it is not true; when we refute something, we are presenting evidence to prove it is false. Similarly, when we challenge something, we are questioning its validity, and when we disprove something, we show conclusively that it is inaccurate or false. All of these words contradict the idea of re-asserting something, making it important to choose the right word depending on the context.