The Chinese word **附加** is a compound verb formed by combining two distinct but semantically related characters: **附** (*fù*), which means "to attach" or "additional," and **加** (*jiā*), which means "to add" or "increase." Together, they create a word whose meaning is essentially "to attach additionally" or "to append," where *附* provides the concept of attachment or supplementary status, and *加* reinforces the action of adding. It functions primarily as a verb (e.g., 附加条件, "to attach conditions") but can also act as an adjective meaning "extra" or "additional" (e.g., 附加费, "additional fee"). This formation follows the common Chinese lexical pattern of pairing synonyms or near-synonyms to create a more precise and nuanced term.