Shank comes from Old English sceanca ('leg, shin bone'), from Proto-Germanic *skankô ('that which is crooked, leg'), related to Old High German scinco ('thigh'). The historical chain includes Old English sceanca and Proto-Germanic *skankô. Older glosses in the chain include "leg, shin bone", "that which is crooked, leg", and "thigh", which help explain the semantic range of the modern word. Morphologically, shank is best read as borrowing, yielding an English noun shaped by both form history and later usage. In current English it functions as a noun, with the sense "the part of the leg between the knee and ankle, or a long narrow stem of a tool". related forms include shanks and jackshank. The result is an English noun whose etymology preserves the older forms while supporting the word's specialized modern meaning.