The word "re-proves" does not have a common antonym, as it is a rare and uncommon term. However, the word "proves" can be considered as its opposite, which means to establish the truth or validity of something. Proves can also be used to show evidence to support a claim or belief. On the other hand, re-proves implies going back to the evidence to re-verify the truth or validity of something, such as a theory or hypothesis. In essence, the antonym of re-proves would be "disproves," which means to show that something is false or invalid.