The word "un-darkened" means to brighten or illuminate something. Its antonyms, on the other hand, refer to different ways of obscuring or darkening something. Some of the antonyms for "un-darkened" include dark, dim, obscure, shadowy, black, and dusky. To darken something means to make it less illuminated or visible. For example, you might darken a room by closing the curtains or switch off the lights to create a shadowy atmosphere. In contrast, to un-darken something means to add light or brightness to it, making it more visible or revealing. Whether you want to darken or un-darken something, there are plenty of words to help convey your meaning accurately.