The crossword solution for the term 'PREFIX WITH -LEAKS OR -PEDIA' is WIKI, which is a four-letter word. WIKI is an abbreviation of the term 'wikiwiki, ' which is Hawaiian for 'QUICK.' It is used to refer to websites that allow users to collaboratively create, edit, and share content. The most popular example of a wiki is Wikipedia, which is an online encyclopedia that anyone can edit. Other examples of wikis include Wikileaks, which is a website that publishes leaked documents, and Wikia, which is a collection of user-created wikis.