diplomatic 
英 [ˌdɪpləˈmətɪk]  美 [ˌdɪpləˈmætɪk] 
adj. 外交的，从事外交的；有外交手腕的；圆滑的

例句：
Everyone who is anyone in the diplomatic corps seems to be here. 

外交团里有头有脸的人物似乎都在这里了。

These diplomatic skills led to her appointment as the President of the United Nations General Assembly. 

凭借这些外交手腕，她被任命为联合国大会主席。

He was extremely diplomatic over the phone. 

他在电话里极其圆滑老练。

That was a very diplomatic way of putting it. 

那么做很圆通得体。

She is very direct. I tend to be more diplomatic. 

她为人直截了当，而我更圆融一些。