The antonyms for the word "re-dress" are "undress" or "disrobe." These words refer to the act of taking off clothes instead of putting them on. "Undress" often implies a removal of clothing due to relaxation or preparation for sleep. "Disrobe," on the other hand, may be used in a more formal context to indicate a removal of clothing before a performance or to symbolize a stripping away of pretense. Both of these antonyms are associated with taking off clothing, whereas "re-dress" is associated with putting on clothing again, typically after a change has been made.