The iron curtain was the closed border that divided Europe for decades. Behind the iron curtain.
The name was made famous by Churchill in 1946 and was not his invention. The iron curtain was a real fence and minefield rather than only a figure of speech.
1nouniron curtainThe closed border that divided Europe for decades.
“Everything behind the iron curtain was a rumour to most of Europe.”
iron curtain is a border.
The phrase existed earlier and was made famous by Winston Churchill in a speech of 1946.
Proto-Indo-European
*ǵʰer-
English, today
iron curtain
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Etymology from Wiktionary, CC BY-SA
Practised in History & Eras