The Chinese word 备份 (bèifèn), meaning "backup", is a modern compound formed by combining two characters: 备 (bèi), which carries the core meaning of "to prepare" or "to have in reserve", and 份 (fèn), which denotes a "portion", "share", or "copy". Together, they create a logical semantic unit that literally translates to "a prepared copy" or "a reserved portion", perfectly capturing the concept of creating a duplicate of data or files as a safeguard against loss. This formation exemplifies how modern Chinese often creates precise technical vocabulary by combining existing meaningful characters to express new, compound ideas.