The antonyms for the word "most soured" are "sweetened," "improved," and "enhanced." Sweetened refers to making something more pleasant or enjoyable, while improved means enhancing the quality or condition of something. Enhanced, on the other hand, means amplifying the value or effectiveness of something. These antonyms are in opposition to the word "most soured," which suggests a negative quality or condition. Using antonyms like sweetened, improved, and enhanced can help to convey a more positive attitude or perspective towards a particular situation or circumstance.