De-colorizing means to remove color or to make something colorless. Antonyms for this word would include coloring, tinting, pigmentation, or highlighting. These are all words that describe the act of adding color to something. Alternatively, synonyms for de-colorizing could include brightening or intensifying, words that describe the act of making something more colorful or vibrant. It's important to note that while antonyms and synonyms can be helpful for understanding language, they don't always capture the full meaning of a word. In the case of de-colorizing, it refers specifically to the act of removing color, while its antonyms and synonyms describe different approaches to adding or intensifying color.