The term "more unmixed" refers to something that is pure, without any additives or impurities. The antonyms for this phrase could be "less pure" or "mixed," indicating that there are elements or ingredients that taint the original substance. When discussing liquids, this could represent a solution that has been diluted, whereas for food, it could mean a dish that has been embellished with seasonings or other components. "More impure" or "tainted" are additional antonyms that could apply to "more unmixed" as they imply some level of contamination, modification, or manipulation. The opposite of "more unmixed" varies depending on the context but generally represents a decline in quality or originality.