The word "大驾" is formed by combining the character "大", meaning "big" or "great", with "驾", which originally denotes a horse-drawn carriage. In ancient Chinese context, "驾" specifically referred to the emperor's carriage, so "大驾" literally means "great carriage". Through direct association, this term came to refer to the emperor himself, and later evolved into a respectful form of address for any esteemed person, meaning "your esteemed self" or "your presence".