The Chinese word "大姚" is formed by combining the character "大" meaning "big" or "great" with "姚" which refers to the Yao ethnic group. As a place name, it literally means "big Yao" and designates Dayao County in Yunnan, China, derived from the Dayao River that flows through the region. The word's structure is a simple compound where "大" modifies "姚" to specify this geographic area.