The Collaborative International Dictionary
Substruct
Substruct \Sub*struct"\, v. t. [See Substruction.] To build beneath something; to lay as the foundation. [R.]
He substructs the religion of Asia as the base.
--Emerson.
Wiktionary
substruct
vb. To build beneath something; to lay as the foundation.
Usage examples of "substruct".
Force fields were created which employed the substruct against which the velocity of light was measured, as a medium within which energies were channeled and directed.
The material substance that was the vessel, being an alien intrusion into that substruct, was subjected to forces attempting to expel it.