Gord

 A gord is a medieval Slavonic fortified settlement usually built on strategic sites such as hilltops, riverbanks, lake islets or peninsulas between the 6th–12th centuries in Central and Eastern Europe. The typical gord usually consisted of a group of wooden houses surrounded by a wall made of earth and wood and a palisade running along the top of the bulwark.

Moczydoly

 Moczydoły is a fictional property of Zych, Jagienka's father. The name is after wetlands on the property.

Mead or honey

Mead is an alcoholic beverage made by fermenting honey mixed with water, and sometimes with added ingredients such as fruits, spices, grains, or hops. The alcoholic content ranges from about 3.5% to more than 20%. The defining characteristic of mead is that the majority of the beverage's fermentable sugar is derived from honey.

The term honey wine (or 'honey' in the book) is sometimes used as a synonym for mead.

Mead was produced in ancient times throughout Europe, Africa and Asia.