The phrase "what done" is not grammatically correct, but if we look at the individual words, we can identify antonyms. "What" is used to ask for information, while its antonym is usually "nothing" or "something else." "Done" means completed or finished, so its antonym could be "unfinished" or "incomplete." Depending on the context, other antonyms for "done" could include "destroyed," "ruined," or "undone." It's important to use appropriate vocabulary and sentence structure to convey clear and effective communication in language.