Arthur high king of britain new word

A great choice!

According to the legend, Arthur High King of Britain is a title given to King Arthur, a legendary British leader who, according to medieval histories and romances, led the defence of Britain against Saxon invaders in the late 5th and early 6th centuries.

The title "High King" is thought to have been used to emphasize Arthur's authority over all of Britain, rather than just a specific region or kingdom. It's a title that has been used in various forms of media, including literature, film, and television, to refer to King Arthur's position as a unifying figure in British history.

So, if you're looking for a new word to describe King Arthur's role, "Arthur High King of Britain" is a great choice!