The Chinese word "博士" is formed by combining the character "博", which conveys the idea of breadth, extensiveness, or erudition, with "士", a term historically denoting a scholar, gentleman, or person of specialized status. Together, they create a compound that conceptually represents a person of wide and deep learning, originally referring to erudite scholars or official titles in ancient China and evolving in modern usage to specifically indicate a holder of a doctoral degree. This formation relies on the semantic fusion of the two characters to express a unified notion of expertise and scholarly achievement.