The term "more begrimed" means to be dirtier or more soiled than before. The opposite or antonym of "more begrimed" would be "cleaner" or "sanitized." It means to be free from or having minimized the accumulation of impurities, dirt, or dust. This antonym holds relevance in many domains, such as cleanliness of spaces, personal hygiene, and environmental sanitation. For instance, a cleaning product that claims to "de-grime" surfaces would guarantee that the surfaces would become cleaner, sanitizing to some extent. In conclusion, the antonym for "more begrimed" is "cleaner," and always make sure to maintain cleanliness to avoid attracting dirt, germs, and other dirt-forming agents.