friendly adj.形容詞, He is a friendly person. They showed a friendly greeting. adv.副詞

　　To describe a friend: close friend, best friend, good friend, terrific friend, lovable friend,loyal friend,longtime friend, old friend, honest friend, supportive friend, humorous friend, kind friend, dependable friend, new friend.

　　friended,friending 形容詞

　　acquainted 結識的 adj.形容詞