root-beer

The term "root beer" is a compound noun formed from two Old English words. "Root" refers to the primary flavoring agents derived from the roots of plants like sassafras, sarsaparilla, and ginger. "Beer" originally denoted any fermented beverage but, by the 19th century in North America, its meaning broadened to include non-alcoholic, fermented drinks made from roots, bark, and herbs. The name thus logically describes a beverage brewed from roots, even though modern commercial root beer is typically a sweet, carbonated soft drink without fermentation.

Structure: root (plant part) + beer (fermented drink) - root: From Old English 'rōt', of Germanic origin; related to Old Norse 'rót'. Refers to the underground part of a plant. - beer: From Old English 'bēor', of West Germanic origin; related to Old Norse 'bjórr'. Refers to an alcoholic drink made from fermented malt.