The word 'wolfhound' is a transparent compound formed from two ancient Germanic roots. The first element, 'wolf', descends from Proto-Germanic wulfaz, itself from the Proto-Indo-European root wĺ̥kʷos, denoting the predatory canine. The second element, 'hound', originates from Proto-Germanic hundaz, from the PIE root ḱwṓ, meaning 'dog'. The compound's logic is perfectly literal: a 'wolf-dog', specifically a type of dog bred for the purpose of hunting or guarding against wolves. This functional naming convention directly links the animal it was designed to confront with its identity as a canine breed, illustrating a straightforward and purpose-driven word formation in English.

Structure: wolf (animal) + hound (dog) wolf: From Old English 'wulf', of Germanic origin; the animal. hound: From Old English 'hund', of Germanic origin; a dog, especially one used for hunting.