The crossword solution for the term 'PREFIX WITH PIT' is CESS, which is a four-letter word. CESS is a prefix that means 'to go' or 'to pass'. It is often used in combination with other words to create new terms, such as 'RECESS' or 'ACCESS'. The term 'prefix with PIT' refers to the use of CESS in combination with the word 'PIT', which can be used to form the word 'cesspit'. A cesspit is a sealed underground tank used to collect and store sewage.