overarching
adj. 首要的；支配一切的；包罗万象的
v. 成拱形（overarch 的 ing 形式）
例句
The overarching question seems to be what happens when the U.S. pulls out?
中心的问题看来是当美国撤出时会发生什么？
《柯林斯英汉双解大词典》
The overarching message is directed at individuals.
总体信息是针对个人的。
This was the overarching purpose.
这正是当初发起这些行动的首要宗旨。
