The word 副本 (fùběn), meaning "copy" or "duplicate", is a compound noun formed through semantic combination. The first character, 副 (fù), carries the meaning of "secondary", "auxiliary", or "deputy", indicating something that is not the primary or original version. The second character, 本 (běn), literally means "root", "origin", or "book/edition", and here refers to the original document or master copy. Thus, the compound logically signifies "a secondary or auxiliary version of the original document", conceptually forming its meaning of a copy made from a source.