well-bred

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌwell-ˈbred adjective old-fashioned  CLASS IN SOCIETYsomeone who is well-bred is polite, and behaves as if they come from a family of high social class 有修养的，有教养的 a well-bred, courteous man 一位温文尔雅、彬彬有礼的男子

Examples from the Corpus

well-bred• His attitude was that of a well-bred man reluctant to discuss some family difference with a prying outsider.• And how could he disguise his well-bred manners and speech?• However, the reckless, well-bred show of bravado did not exactly endear the utterer to two other boys of like age.• Sometimes the health problem can be very serious: Winsome was a well-bred Thoroughbred brood mare.• I mean, I am a well-bred woman.• Such a nice, polite, well-bred young woman.

ˌwell-ˈbred adjectiveChineseSyllable  

someone and Corpus who is is well-bred polite,

well-bred
ˌwell-ˈbred adjective old-fashioned
someone who is well-bred is polite, and behaves as if they come from a family of high social class:
    a well-bred, courteous man