The term 'INFIDEL' is a seven-letter word used to describe someone who does not believe in a particular religion or set of beliefs. It is often used to refer to someone who does not accept the teachings of a particular faith, such as Christianity or Islam. The term can also be used to describe someone who does not accept the principles of a particular ideology or system of thought. In general, an INFIDEL is someone who does not accept the beliefs of the majority.