hæsel

Old English hæsel meant both the hazel tree and the color of its nuts — a warm brown that English still calls hazel. The word has cognates across every Germanic language: German Hasel, Dutch hazelaar, Old Norse hasl, Swedish hassel. This spread suggests a Proto-Germanic ancestor, *hasalaz, that was already old when the Germanic peoples split apart around 500 BCE.

Latin had its own unrelated word for hazel: corylus, which Linnaeus used for the botanical genus name in 1753. Some etymologists have tried to connect hæsel to corylus, but the phonological changes required are implausible. The two words appear to be independent coinages for the same tree — evidence that hazel grew everywhere in ancient Europe and every culture named it independently.

The compound hazelnut is straightforward Old English: hæsel + hnutu (nut). The tree and its nut were dietary staples across northern Europe for millennia. Archaeological sites in Mesolithic Scotland — 8,000 years old — contain charred hazelnut shells in quantities that suggest deliberate cultivation, or at least systematic harvesting. People were eating hazelnuts in Britain four thousand years before anyone spoke anything resembling English.

The hazel tree held a special place in Celtic and Norse mythology. Hazel rods were used for divination and dowsing. In Irish legend, the Salmon of Knowledge gained its wisdom by eating hazelnuts that fell into a sacred pool. The word hæsel may carry traces of an even older, pre-Indo-European substrate language — a word borrowed from the people who were already living among hazel groves when the Indo-Europeans arrived.