Leek: The Allium That Named Garlic
The English word *leek* is one of the oldest plant names in the Germanic languages, and it carries within it a forgotten history: in Old English, *lēac* did not mean only the leek — it meant *all* allium plants. Garlic, onion, chive, and leek were all *lēac*, differentiated only by a qualifying word. That original breadth of meaning is still visible in one of the most familiar words in English: *garlic*.
From Proto-Germanic Root
The Old English form *lēac* descends from Proto-Germanic *\*laukaz*, a well-attested root across the northern European languages. Swedish *lök* means onion — the everyday word for the onion at the market — yet it is the same word, the same Proto-Germanic root, shifted to cover a different allium in a different land. Dutch *look*, German *Lauch* (leek), Old Norse *laukr*, Old Frisian *lāk* — all are cognate reflexes of *\*laukaz*. The root is confined to Germanic and has no secure Indo-European cognate outside the family, which suggests it may have entered early Proto-Germanic as a borrowing from a pre-Indo-European substrate language.
Garlic: The Spear-Leek
The most striking survival of Old English *lēac* is hidden in plain sight in *garlic*. The word is a compound of Old English *gār* (spear) + *lēac* (allium plant). A *gārlēac* was a spear-leek — so named because the individual clove of garlic, when separated from the bulb, tapers to a sharp point resembling a spearhead. The Anglo-Saxons looked at a garlic clove and saw a weapon.
Jacob Grimm paid close attention to compound plant names of precisely this type: descriptive kennings built from a concrete noun plus the generic plant term. *Gārlēac* follows the same logic as other OE compounds. The descriptive element qualifies the generic, and the generic — *lēac* — has since retreated to denote only one member of the allium family, leaving *garlic* as its fossilised compound cousin.
The Old English Leechbooks
Old English medical literature — the *Bald's Leechbook* and the *Lacnunga*, both surviving in tenth-century manuscripts — prescribes leek remedies with striking frequency. Leek was prescribed for eye conditions, wounds, lung ailments, and headaches. One recipe calls for *gārlēac* mashed with bull's gall and wine, left to steep in a copper vessel for nine nights, strained through a cloth, and applied to an infected eye — a preparation that modern microbiologists at the University of Nottingham, testing it in 2015, found to have genuine antibacterial properties against *Staphylococcus aureus*.
Norse Ritual: Leeks and Warriors
In Old Norse, *laukr* carried ritual significance beyond the kitchen. The Eddic poem *Rígsþula* describes the god Rígr placing a *laukr* on an infant boy. The gesture is a naming rite, a symbol of warrior vitality and manhood. In the *Sigrdrífumál*, Sigrdrífa instructs Sigurðr in rune-knowledge and includes *laukr* among the protective plants. Leeks appear scratched onto sword-hilts as apotropaic marks. The word *laukr* in Old Norse carries connotations of protection, sharpness, and vitality that the modern Swedish *lök* (onion) has shed entirely.
The Welsh Emblem
Wales adopted the leek as a national emblem by at least the sixteenth century. The most popular legend credits a battle in which Welsh warriors wore leeks in their caps to distinguish themselves from the enemy. Shakespeare's *Henry V* references it, with the Welsh captain Fluellen insisting that the king wear a leek on Saint David's Day.
Survival and Narrowing
The semantic history of *leek* is a story of narrowing. *\*Laukaz* once covered an entire genus; it survives in Modern English as the name of a single cultivar. Swedish *lök* covers the onion; English *leek* covers the leek; *garlic* covers the garlic — three modern words for three species, all from the same Proto-Germanic root, each having narrowed to one member of the family that the original word embraced whole.