The term "un alloyed" refers to something that is pure and not mixed with anything else. In antonyms, it means that something is mixed or combined with other elements or is impure. Words that are antonyms to "un alloyed" include "mixed," "combined," "impure," "contaminated," and "tainted." These words suggest that the substance is not pure and may have been altered or tampered with. Examples of sentences using these antonyms include, "The gold was mixed with copper, making it impure," or "The water was contaminated with pollutants, making it tainted." Overall, antonyms for "un alloyed" describe something that is not pure or unaltered.