The antonyms for the word "makes dim" are numerous, as there are many terms that signify brightening and illuminating. Some possible antonyms include "brightens," "illuminates," "enlightens," "clarifies," "shines," and "lights up," among others. Each of these words carries a slightly different connotation, but all suggest a process of making something more visible or clear. For example, "brightens" suggests a sudden burst of light, while "enlightens" implies a deeper understanding. Using these antonyms in place of "makes dim" can create a very different tone in writing, one that emphasizes clarity, visibility, and insight.