The antonyms for the word "most overrefined" would be "unrefined", "crude", "rough", "raw", "uncultivated", "unsophisticated", "primitive", "basic", "rudimentary", or "natural". These words contrast with the idea of being overrefined or excessively refined, suggesting a lack of refinement, polish or sophistication. They indicate a more straightforward, unadorned approach to things, emphasizing simplicity or a preference for natural, unprocessed materials. Without these contrasting concepts, the notion of being "most overrefined" would not have any meaning or value as it requires an opposite for comparison.