The compound adjective 'wall-sized' is a modern formation following a transparent English pattern. The first element, 'wall', traces back to a Latin term for a defensive fortification, which entered Old English and generalized to mean any continuous vertical structure enclosing or dividing space. The second element, 'sized', employs the common adjectival suffix '-ed' attached to the noun 'size', a word ultimately related to the concept of a settled or fixed amount. Combined, the term's logic is entirely literal: it describes an object, typically a display, artwork, or screen, whose dimensions are such that it can occupy the space of an entire wall, evoking a sense of imposing scale and comprehensive coverage.

Structure: wall (barrier) + sized (having a size) - wall: From Old English 'weall' (rampart, defensive wall), from Latin 'vallum' (rampart, palisade). Functions as a noun root specifying the object of reference. - sized: From the noun 'size' (dimension, magnitude) + the suffix '-ed' (having, provided with). 'Size' originates from Old French 'sise', a shortening of 'assise' (session, regulation, fixed position). Functions as an adjective-forming suffix indicating possession of a specified dimension.