Etymology
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structure (n.)
mid-15c., "action or process of building or construction;" 1610s, "that which is constructed, a building or edifice;" from Latin structura "a fitting together, adjustment; a building, mode of building;" figuratively, "arrangement, order," from structus, past participle of struere "to pile, place together, heap up; build, assemble, arrange, make by joining together," related to strues "heap," from PIE *streu-, extended form of root *stere- "to spread."
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structure (v.)
"put together systematically," by 1855 (occasional use from late 16c.), from structure (n.). Related: Structured; structuring.
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structural (adj.)
1814, from structure + -al (1). Related: Structurally.
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structured (adj.)
1810, past-participle adjective from structure (v.). Meaning "organized so as to produce results" is from 1959.
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restructure (v.)

"organize in a new pattern," 1951, from re- "back, again" + structure (v.). Related: Restructured; restructuring.

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substructure (n.)
1726, "foundation, part of a building which supports another part," from sub- + structure (n.). Earlier in this sense was substruction (1620s). Related: Substructural.
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infrastructure (n.)
1887, from French infrastructure (1875); see infra- + structure (n.). The installations that form the basis for any operation or system. Originally in a military sense.
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*stere- 
*sterə-, also *ster-, Proto-Indo-European root meaning "to spread."

It forms all or part of: consternate; consternation; construct; construction; destroy; destruction; industry; instruct; instruction; instrument; obstruct; obstruction; perestroika; prostrate; sternum; sternocleidomastoid; strain (n.2) "race, stock, line;" stratagem; strategy; strath; strato-; stratocracy; stratography; stratosphere; stratum; stratus; straw; stray; street; strew; stroma; structure; substrate; substratum; substructure.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit strnoti "strews, throws down;" Avestan star- "to spread out, stretch out;" Greek stronymi "strew," stroma "bedding, mattress," sternon "breast, breastbone;" Latin sternere "to stretch, extend;" Old Church Slavonic stira, streti "spread," strana "area, region, country;" Russian stroji "order;" Gothic straujan, Old High German strouwen, Old English streowian "to sprinkle, strew;" Old English streon "strain," streaw "straw, that which is scattered;" Old High German stirna "forehead," strala "arrow, lightning bolt;" Old Irish fo-sernaim "spread out," srath "a wide river valley;" Welsh srat "plain."
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morphology (n.)

1824 in biology, "science of the outer form and inner structure of animals and plants," from German Morphologie (1817); see morpho- "shape" + -logy "study of." By 1869 in philology, "science of structure or forms in language." General sense of "shape, form, external structure or arrangement" is by 1890. Related: Morphological; morphologist. Related: Morphologist.

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