diplomatic/dɪpləˈmætɪk/
adj.1. 外交的，从事外交的Julia joined the diplomatic service after her graduation from the university.朱丽娅大学毕业后就到外交部门工作了。
2. 有策略的，有交际手腕儿的Try to be diplomatic when you refuse her invitation, so as not to cause bad feeling.谢绝她的邀请时要有技巧，以免造成恶感。