How is king Arthur addressed in the story?

In the stories of King Arthur, he is often addressed with titles that reflect his noble status, such as "King Arthur," "the Once and Future King," or simply "Arthur." His character is frequently referred to in a reverential manner, highlighting his role as a wise and just ruler. Additionally, he is sometimes addressed as "sire" or "my lord" by his knights and subjects, emphasizing the feudal hierarchy of the time. Overall, the language used to address Arthur underscores his legendary status and the respect he commands.