The term 'PREP SCHOOL BRITISH' can be summarized by the crossword solution 'ETON', which is a four-letter word. Eton College is a prestigious British boarding school located in the town of Eton, near Windsor in Berkshire, England. Founded in 1440 by King Henry VI, it is one of the oldest and most famous schools in the world. It is known for its traditional British education and its alumni, which include many prominent figures in politics, business, and the arts.