During the Korean War, it was revealed that up to 30% of American POWs collaborated with the Chinese and North Koreans after being taken captive. To justify these statistics, the American media began claiming that the Communist regimes were brainwashing soldiers, a term first being coined in a 1950 Miami News article by Edward Hunter and meant to mean "psychologically influence". This might seem like a simple portmanteau of brain and wash, which it is to some extent, but it is also a calque (literal translation) of a Chinese idiom sounding like xinao and meaning "to wash the brain". This was actually used by the Communists and was a bit of a pun on the xixin custom, a Taoist ritual of "cleaning the mind". However, the word literally comes from nao, meaning "brain" (from Proto-Tibetan snewk), and xi, meaning "brain" (from Sino-Tibetan mbsjl). Without the Chinese word, we wouldn't have the English word, and what a loss to our culture that would be.
Adam Aleksic, a freshman studying linguistics at Harvard University, has been described as the internet's sixth most famous etymologist. He has disturbing interests in words, vexillology, geography, board games, limericks, and law, and he loves writing about himself in the third person.
The Etymology Nerd