base structure; underlying structure
Technical term used in linguistics, architecture, and other fields to refer to the fundamental or deep structure underlying surface phenomena.
Chomsky proposed the base structure of grammar.
The underlying structure of this building is made of reinforced concrete.
Refers to the surface structure, often contrasted with 基底構造 in linguistics.
Compound of 基底 (base, foundation) and 構造 (structure). The term is a calque from English 'base structure' or 'underlying structure', commonly used in academic contexts.