Interfolded refers to the action of folding one item inside another in a pattern. When it comes to antonyms for this word, there are quite a few options. Unfolded, for example, would be the opposite of interfolded, as it means to lay something out flat or straighten it. Another antonym could be separated, which means to divide or spread items apart from one another. Unraveled could also be considered an antonym for interfolded, as it refers to the action of untangling or unweaving something that has been tightly woven together. Ultimately, the antonym for interfolded depends on the context in which the word is being used.