intern

Hemingway の'A Farewell to Arms'を読んでいます。
“I’m in a jam, Sim,” I said.
“So am I,” he said. “I’m always in a jam. Won’t you smoke?”
“No,” I said. “What’s the procedure in going to Switzerland?”
“For you? The Italians wouldn’t let you out of the country.”
“Yes. I know that. But the Swiss. What will they do?”
“They intern you.”
“I know. But what’s the mechanics of it?”
“Nothing. It’s very simple. You can go anywhere. I think you just have to report or something. Why? Are you fleeing the police?”
“Nothing definite yet.”
“Don’t tell me if you don’t want. But it would be interesting to hear. Nothing happens here. I was a great flop at Piacenza.”

この動詞の "intern" は何でしょう？　医者のインターンとかインターンシップとかは日本語でも使われていますが？
・Oxford English Dictionary: to put somebody in prison during a war or for political reasons, although they have not been charged with a crime
・Collins Dictionary: If someone is interned, they are put in prison or in a prison camp for political reasons.: He was interned as an enemy alien at the outbreak of the Second World War.

・Cambridge English Dictionary: to put someone in prison for political or military reasons, especially during a war: Many foreigners were interned for the duration of the war.
日本語で使われるインターンとは全然違いますね。しかし、次の説明を読むと関係があるのが分かります。

・Vocabulary.com: Somewhere between being a student and a professional is the life of an intern, an advanced student, especially in medicine, who gets on-the-job experience.
To intern or be an intern is to leave the classroom behind and start doing part of your profession — usually, the job of being a doctor. Sometimes an intern is paid, but not always, and the pay is never great. The experience is considered payment in itself. There have been many medical TV shows that feature interns, probably because the hours are long, the job is difficult, and there are many opportunities for drama in this boot camp for doctors. Medical interns may appreciate another meaning, which means to take away someone's freedom, as in "Why did you intern the prisoners?"
研修医が大変だというのは言葉に表れているのですね。