Mannerly

1. (a.) Showing good manners; civil; respectful; complaisant.

2. (adv.) With good manners.

Thesaurus Entries

accommodatingly, attentively, chivalrously, civilly, complacently, complaisantly, correct, courteous, courteously, courtly, deferentially, gallantly, genteel, good-mannered, gracefully, graciously, knightly, obligingly, polite, politely, respectfully, urbanely, well-behaved, well-mannered, well-spoken