Antonyms are words that have opposite meanings. The word "scummiest" can be defined as the most dishonest, low-life, or disreputable. Therefore, its antonyms would be words that represent the opposite meaning such as honest, moral, and reputable. Some other antonyms for "scummiest" are dignified, decent, respectable, honorable, and trustworthy. These words represent the positive attributes of a person or organization and can be used to describe someone who is highly respected and credible. In short, antonyms for "scummiest" reflect the highest standards of integrity, morality, and decency.