well bred
adjective
she is too well bred to say anything:
well brought up, well mannered, well behaved, polite, civil, courteous, respectful, deferential;
ladylike, gentlemanly, chivalrous, gallant, genteel, cultivated, gracious, obliging, considerate, thoughtful, urbane, formal, proper, refined, polished;
dated mannerly.
▷antonyms rude, discourteous, ill-bred.
well bred Oxford Dictionary of English