Why were kings in Egypt called pharaoh not kings?

The term "pharaoh" originally referred to the royal palace in ancient Egypt, but over time it became synonymous with the king himself. This shift in terminology reflected the divine status attributed to the ruler, emphasizing their role as a mediator between the gods and the people. Unlike the term "king," which is more generic, "pharaoh" conveyed a unique cultural and religious significance in the context of ancient Egyptian society.