The crossword solution for the term 'PREFIX FOR WAY' is 'THRU', which is a four-letter word. The prefix 'thru' is commonly used to mean 'THROUGH' or 'all the way THROUGH'. It is often used in place of the word 'THROUGH' when referring to a physical journey, such as driving 'thru' a town or walking 'thru' a park. It is also used to describe a process that is completed from start to finish, such as 'thru' a project or 'thru' a task.