The crossword solution for the term 'prefix with -cracy' is IDIO. This is a prefix derived from the Greek word 'idios, ' meaning 'ONE's own.' It is often used to refer to a form of government or rule, such as an autocracy or democracy. For example, an autocracy is a form of government in which ONE person has absolute power, while a democracy is a form of government in which power is shared among the people.