Iron curtain and Turndown

Iron curtain noun - An impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries.

Turndown and iron curtain are semantically related. In some cases you can use "Turndown" instead a noun phrase "Iron curtain".

Turndown noun - An unwillingness to grant something asked for.

Iron curtain and turndown are semantically related. Sometimes you can use "Iron curtain" instead a noun "Turndown".