well-bred

mannerly

Synonyms: aristocratic, blue-blooded, civil, considerate, courteous, courtly, cultivated, cultured, gallant, genteel, gentle, noble, patrician, polished, polite, refined, taught, trained, upper-crust, urbane, well-behaved, well-mannered

Antonyms: ignoble, unmannered, unrefined, unsophisticated