unauthorized
adj. 未经许可（或批准）的，未经授权的
例句
Nations react strongly to unauthorized overflights.
各国对于未授权的飞越领空反应强烈。
《柯林斯英汉双解大词典》
It has also been made quite clear that the trip was unauthorized.
这次旅行是未经过批准的，这一点也已经非常清楚了。
No unauthorized changes be made.
不得擅自修改。
《新英汉大辞典》
