adj.磨坏的；陈旧的；疲惫的
动词outwear的过去分词形式.
We must break away from outworn rules and regulations. 我们必须打破陈旧的规章制度。
He has been outworn by his big family. 他拼命工作以养活他众多的孩子， 他已累垮了。
