dog-food

The compound noun "dog-food" is a transparent combination of two Old English roots: "docga" (a powerful breed of canine) and "foda" (nourishment, sustenance). Its literal meaning, "food for dogs," emerged naturally as a descriptor for commercially prepared canine diets. The modern verb sense, "to dog-food" or "to dogfood," is a metaphorical back-formation from the noun, originating in the tech industry to describe the practice of a company using its own products internally to test and demonstrate their quality. This evolution illustrates how a simple, concrete compound can develop a specialized, abstract meaning within a professional context.

Structure: dog (canine animal) + food (nourishment) dog: Old English origin, functional role: noun base specifying the animal. food: Old English origin, functional role: noun base specifying the substance.