courteous

polite, civil, courteous

形容词 courteous:

1. exhibiting courtesy and politeness
   同义词：gracious, nice
2. characterized by courtesy and gracious good manners-Francis Bacon

1. It behoves you (ie You ought) to be courteous at all times.
   你应当时时刻刻注意礼节。
2. She needed to soften her request to make it as polite and courteous as she could.
   她需要使请求语气柔婉，以便尽可能把它变成有礼貌与客气。
3. A person who is virtuous is also courteous.
   有德者必知礼。
4. Not courteous or in good taste; ungracious.
   没有礼貌的或没有好品味的; 粗野的
5. It was courteous of him to help the old lady with her bundles.
   他很有礼貌地帮助那个老太太扛包裹。

cour.te.ous

adj.（形容词）
Characterized by gracious consideration toward others.See Synonyms at polite
谦恭的，有礼的：对别人照顾周全的，有礼貌的，殷勤的参见 polite

来源：
Middle English corteis [courtly]
中古英语 corteis [有宫廷气派的，威严的]
from Old French
源自 古法语
from cort [court] * see court
源自 cort [王宫，宫廷] *参见 court

【引伸】
cour.teously
adv.（副词）
cour.teousness
n.（名词）