library

Latin liber originally referred to the inner bark of a tree — the thin, pale layer between the outer bark and the heartwood, which could be peeled away, dried, and used as a writing surface. This practice predates papyrus in Italy and was likely the earliest readily available medium for writing in the Italian peninsula. From this material meaning, liber came to mean 'book' — the written document itself, regardless of the material it was made from. The derivative librarium meant 'a bookcase' or 'a place for books,' and from this came libraria, a collection of books. The word entered Old French as librairie (which still means 'bookshop' in modern French, a persistent source of confusion for English speakers in Paris), and Middle English borrowed it as 'library' by the fourteenth century. The bark is three linguistic generations removed, but it is still there.