Question of the Day #333

"William Barr sworn in as attorney general, will oversee Mueller investigation"
From the headline of this article at ABC News.

上記の文で、swear in の意味は？
In the sentence above, what does "swear in" mean?

答えは、コメントに書いてください。
Write your answer in the Comments.

明日、ここに答えを書きます。
I will add the answer and other remarks here tomorrow.

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解答

意味：
英辞郎によると、


（人）を宣誓就任させる

Answer

According to Merriam-Webster:

to induct into office by administration of an oath

Etymology/語源

Merriam-Websterによると、

初めて使われたのが、1536年。

According to Merriam-Webster:

First Known Use of swear in: 1536

Examples

• He was sworn in as deputy prime minister.
• A new president will be sworn in today.
• ‘he was sworn in as president on 10 July’