friend本身就是名词形式。
friendn.朋友;友人;赞助者;支持者;
v.与…为友
Her friends from work came to see her in the hospital.
她工作单位的朋友来医院看望她。
Her family and friends have given her lots of support.
家人和朋友给了她许多帮助。
She met up with some of her old school friends.
她遇见几个老同学。
水利万物而不争,
而万物莫能与之争。