The word's journey begins with the Proto-Indo-European root stere- meaning "to spread," which evolved into the Latin verb struere, "to pile up or build." From this came structura, denoting a physical construction. The suffix -alis was added to form the adjective structuralis in Medieval Latin, shifting the meaning to "relating to the arrangement and interrelation of parts." Finally, the productive Greek-derived suffix -ism was appended in the 19th and 20th centuries, transforming the adjective into an abstract noun that names a theoretical doctrine. Thus, the literal logic of "the theory (-ism) relating to (-al) building (structur)" evolved metaphorically from physical architecture to the analysis of conceptual systems in language, anthropology, and thought.

Structure: structur (something built) + al (relating to) + ism (doctrine or theory) - structur: From Latin structura (a building, structure). The root is struere (to pile up, build). It functions as the core noun base. - al: A suffix of Latin origin (-alis), forming adjectives meaning "of, relating to, or characterized by." Here, it forms the adjective structural. - ism: A suffix of Greek origin (-ismos), forming nouns denoting a system, theory, doctrine, or principle. It forms the final abstract noun.