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Vinony

substructure

noun

  1. underlying part of a structure
L328728 on Wikidata ↗

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- English structure English substructure From sub- + structure.

  1. The supporting part of a structure (either physical or organizational; the foundation).
  2. The earth or gravel that the railway tracks are embedded in.
  3. Synonym of base (“the forces and relations of production that produce the necessities and amenities of life”).