The antonyms for the term "most ill-behaved" are many and varied, including such terms as well-behaved, obedient, disciplined, respectful, courteous, polite, good-mannered, and civilized, among others. These terms denote a high level of social decorum and a well-developed sense of propriety and respect for others. Those who exhibit these traits are often valued members of society as they are pleasant to be around and are less likely to cause problems for others. In contrast, those who are ill-behaved are often seen as disruptive and unpleasant, and may be ostracized from social groups or even face legal repercussions for their actions.