The word 称呼 is formed by combining two characters with closely related meanings to create a single, more nuanced concept. The first character, 称, carries the core idea of naming, designating, or stating a title. The second, 呼, adds the dimension of calling out, addressing, or vocalizing that name. Together, they merge the act of assigning a name or title with the act of using it in address, effectively forming a term that encapsulates the entire social concept of how one person is to be addressed or referred to by another.