dossier

The word 'dossier' entered English in the 19th century directly from French, where it originally meant a bundle of papers with a label on the back. The French term derives from dos, meaning 'back', which itself originates from Latin dorsum (the back). The semantic evolution moved from the physical 'back' of a file to the file itself, and finally to its modern, abstract sense of a detailed, often confidential, collection of documents on a specific subject. This journey from a concrete anatomical term to an abstract administrative concept illustrates a classic path of semantic specialization within bureaucratic language.

The word is a loanword from French, adopted as a single lexical unit. Its internal French structure is dossier (a bundle of papers), derived from dos (back), referring to the label on the back of a file.