The word 'wiry' is a straightforward English derivation from the noun 'wire'. The core noun 'wire' itself has a Germanic origin, tracing back to Old English 'wīr', likely from a Proto-Germanic root meaning "metal drawn out into a thread." The addition of the adjectival suffix '-y', a common feature in English word formation, creates the meaning "resembling or having the characteristics of wire." This semantic evolution is logical: just as wire is thin, strong, and flexible, a 'wiry' person is lean and sinewy, and 'wiry' hair is stiff and coarse like metal thread. The term perfectly encapsulates the transfer of physical properties from a material object to descriptions of living beings and other textures.

Structure: wir(e) (wire) + y (adjective-forming suffix) 'Wir' is a direct substring of the English noun 'wire', which originates from Old English 'wīr'. The suffix '-y' is a productive English adjectival suffix from Old English '-ig', used to form adjectives meaning "having the qualities of" or "full of".