The word "most ungentlemanlike" has several antonyms that connote decorum, refinement, civility, and class. These include words such as chivalrous, respectful, courteous, genteel, polished, refined, dignified, elegant, sophisticated, and suave. These terms are associated with cultural norms and social behavior that exhibit a sense of decency, civility, and respectfulness toward others. While "most ungentlemanlike" implies a grossly inappropriate or boorish behavior, its opposite terms reflect an individual's cultured manners and positive social conduct. When used in appropriate context and situations, such words can express a sense of admiration, esteem, and social grace.