The word "most besmirched" means something that has been tarnished or sullied. Its antonyms would be words that convey the opposite meaning, such as pure, pristine, or untarnished. These words indicate something that is clean, refined, and uncontaminated. Other antonyms for "most besmirched" include immaculate, unblemished, spotless, and flawless. When we use these words in a sentence, we are implying that something does not carry any negative connotations or has been affected by any type of damage. Therefore, using antonyms to "most besmirched" can help us convey a more positive and optimistic message.