full-size

The compound adjective "full-size" is a transparent combination of two native English elements. "Full," with its Proto-Germanic root fullaz, conveys a sense of completeness and lack of reduction. "Size" entered English via Anglo-Norman law, where an "assize" was a fixed statute or measurement. Over time, "size" generalized to mean the physical dimensions of an object. When combined, the term logically denotes an object possessing its complete, standard, or unreduced dimensions, as opposed to a scaled-down model or variant.

Structure: full (complete) + size (dimension) - full: From Old English full, meaning "complete, entire." It functions as an intensifier, indicating completeness. - size: From Old French sise, a shortened form of assise ("assize, regulation, fixed amount"), ultimately from Latin assidere ("to sit beside, assist in judgment"). In this compound, it functions as the core noun meaning "dimensions or magnitude."