/fɜːr/
[noun] The soft, thick hair that covers the body of certain animals, or a material made from this hair used to make warm clothing and accessories.
The word 'fur' originally meant the lining of a garment, not the animal's coat itself — the animal came second.
The story of 'fur' begins not in a forest or a trap line, but in a tailor's workshop. The word entered Middle English in the 14th century from Old French *forre* or *fuerre*, meaning a sheath, lining, or case — the kind of soft material sewn inside a garment to keep it warm. This Old French word came from a Frankish root *fōdr*, meaning a sheath or scabbard, which is related to the Proto-Germanic *fōdraz*, also carrying the sense of a covering or protective lining. The same Germanic root gave Old High German *fotar* and Old Norse *fóðr*, both meaning a lining or casing for something else.
The original meaning, then, was entirely about function and craft. When a medieval tailor 'furred' a coat, he was lining it — typically with the pelt of an animal turned fur-side inward for warmth. The verb *furren* in Old French meant to line or trim with fur, and this is actually older in spirit than the noun form. The garment came first in the language; the animal's coat was named after what people did with it, not the other way around.
Over time, English speakers began to use 'fur' to refer not just to the lining but to the material itself — the soft animal hair — and eventually to the coat of a living creature. This shift from a crafted, human object to a natural one is a fascinating reversal. By the 15th and 16th centuries, 'fur' had fully expanded its meaning to cover animal pelts in their raw, unworked state, and then to the hair growing on the animal in the wild. The tailor's term had become a naturalist's term.
The trade in animal furs was enormously important in medieval and early modern Europe, and later in the Americas. The fur trade shaped entire economies, drove exploration of Canada and Siberia, and influenced which animals became endangered. Words like 'furrier' — a person who works with or sells fur — came naturally from the same root, passing through Old French *fourrier* before settling into English. The German word *Futter*, meaning lining or animal fodder, is a close cousin from the same Germanic ancestor, showing how the original 'covering' sense spread in multiple directions.
Interestingly, the word also developed figurative and extended uses. The white or yellowish coating that sometimes appears on the tongue during illness, or the mineral deposits inside a kettle, are both called 'fur' in British English — because they look like a soft, fuzzy lining on an inner surface. This usage keeps alive the oldest sense of the word: a coating on the inside of something, exactly as the medieval tailors understood it. The animal and the kettle, separated by centuries, are united by a single thread of meaning that stretches back to a Frankish sheath.