The word 'stockyard' is a transparent compound formed from two native English words, 'stock' and 'yard'. 'Stock' originally referred to a tree trunk or post in Old English, a sense preserved in 'stock of a rifle'. Its meaning broadened metaphorically to denote the source or foundation of something, such as the 'stock' from which a family descends. In agricultural and financial contexts, it came to signify the capital or resources one owns, which included herds of animals, leading to its specific meaning of 'livestock'. 'Yard' has consistently meant an enclosed area of ground. Thus, a 'stockyard' is literally an enclosure for livestock, a meaning that directly and logically combines the core senses of its two constituent parts, reflecting its practical function in the meatpacking and railway industries of the 19th century.

Structure: stock (livestock) + yard (enclosed area) stock: From Old English 'stoc' (tree trunk, post, stake), later extended to mean the source or origin of something, and eventually to livestock as a capital asset. In this compound, it functions as the head noun specifying the type of animal. yard: From Old English 'geard' (enclosure, court, dwelling). In this compound, it functions as the base noun specifying the type of location.