sub-strŭo, xi, ctum, 3, v. a.,
to build beneath , to underbuild , lay; lit.: fundamentum, Plaut. Most. 1, 2, 40: intervalla montium, Vitr. 8, 7 med. ; cf.: intervalla substructis canalibus junguntur, Plin. 33, 4, 21, § 74: locus substructus, Varr. L. L. 5, § 155 Müll.: Capitolium saxo quadrato, Liv. 6, 4: substruendo iter facere, Dig. 8, 1, 10: vias glareā, i. e. to lay , to pave , Liv. 41, 27.— Absol. : non alte substruitur, the foundation is not laid deeply , Vitr. 8, 6, 5. —P. a. as subst.: substructum , i, n., = substructio, Vitr. 8, 7 med.