The term 'Biblical Word Endings' refers to the suffixes that are commonly used in the Bible. The most common of these suffixes are ETHS, which is a four-letter suffix that is used to denote a person or thing of a certain quality or character. This suffix is often used to refer to a person or thing that is holy or sacred. For example, the word 'PROPHET' can be written as 'prophetseths' to indicate that the person is a PROPHET of God. Additionally, this suffix is also used to denote a place or thing that is associated with a particular religion or culture. For example, the word 'JERUSALEM' can be written as 'Jerusalemeths' to indicate that it is a holy city for the Jewish people.