What is coffee decoction?

Coffee decoction is a type of coffee that is made using hot water instead of brewed coffee. It is typically made by adding coffee grounds or beans to hot water and then boiling them for a short period. The resulting liquid is then strained to remove the grounds or beans. Coffee decoction is a popular choice for making iced coffee or cold coffee, as it is more concentrated and can be served over ice. It is also a popular way to make coffee in parts of the world where ground coffee is not widely available, as it can be made using whole coffee beans.