"Be dizening" means to dress up or adorn oneself in fancy or ostentatious clothing. Some antonyms for this phrase might include dressing down, simplifying, or understating one's attire. Other possible antonyms might include using more subdued colors, avoiding excessive jewelry or accessories, or opting for a more casual or natural appearance. Antonyms for "be dizening" might be appropriate in situations where a more low-key or unassuming appearance is desired, such as at casual events, in professional settings, or during times of mourning or reflection. While dressing up can be fun and enjoyable, there are certainly times when simplicity and restraint are more appropriate.