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GYXrJ TIL Scot-free originally meant tax-free, scot is the Middle English word for tax. It later took on its current meaning of escaping consequences.
BrQWx TIL: Mr. And Mrs. wasn’t originally short form for mister and missus, but master and mistress
lo1O1 TIL: George Orwell, the author of 1984, was the one who coined the term "cold war" to describe post-WWII relationship between the US and the USSR. He used it to describe the new landscape that the atom bomb created.