The phrase "more illbred" suggests a lack of refinement or manners in a person's conduct. Antonyms for "illbred" include words like polished, courteous, elegant, and cultured. Someone who is polished exhibits a sophisticated demeanor and good taste, while someone who is courteous is respectful and well-mannered. An elegant person displays stylish and refined behavior, while someone who is cultured is knowledgeable about the arts and humanities. These opposing words convey a level of refinement and class that are the opposite of "more illbred." A person's demeanor and manners can greatly influence how they are perceived by others, and utilizing polished and cultured behavior can make a notable difference in how individuals view them.