You searched for: “substructural
substructural (adjective)
1. Referring to the basic structure or features of a system or organization.
2. Descriptive of the lowest or underlying support of a construction: "The bridge's substructural parts have rusted and been damaged; so, it has been closed to traffic."
This entry is located in the following unit: stru-, struct-, -structure, -struction, -structive (page 10)