The word "un-mannerly" refers to someone or something that is lacking in good manners or behaving in a rude or impolite way. Its antonyms are "polite," "courteous," "gracious," "well-mannered," "respectful," and "gentlemanly" or "ladylike." Polite refers to a person who shows good manners and behaves courteously towards others. Courteous means showing respect and consideration for others. Gracious is a synonym for polite, indicating a warm and sincere politeness. Well-mannered means someone who is polite and courteous, while respectful is when a person shows high esteem or deference. Lastly, gentlemanly or ladylike is used to describe behaviour that is characterized by mannerly and courteous conduct.