The word "re-does" means to do something again or repeat a process. An antonym for this word would be to undo or reverse a process. This could be achieved by using terms such as break, dismantle, unmake, or invalidate. While "re-does" implies a positive action towards achieving a better outcome, the opposite of this action can produce negative results. For instance, undoing a previous action can lead to failed attempts or dissatisfaction with the outcome. Antonyms, in general, are useful in creating contrast, emphasizing differences or highlighting the opposite of a word to provide a clearer understanding of its meaning.