adj.失礼的；无礼貌的
His discourteous behavior can't be forgived. 他的举止失礼是不能原谅的。
He was rather discourteous to Captain. 他对上校相当无礼貌。
It was discourteous of you to arrive late. 你迟到了，真没礼貌。
adv.不礼貌地；粗鲁地
