The crossword solution for the term 'Biblical or Ordinal Suffix' is ETH, which is a three-letter suffix. ETH is a Hebrew suffix that is used to denote ordinal numbers in the Bible, such as first, second, and third. It is also used to indicate a person's rank or position in a family, such as son of or daughter of. In modern English, ETH is often used to form adjectives, such as fourth or fifth.