The word 大规模 is formed through a logical, layered combination of individual meaning-units: the first character 大 (dà) means "big" or "great", which then directly modifies and magnifies the meaning of the two-character compound 规模 (guīmó) that follows. This compound 规模 itself is a fused concept where 规 conveys "regulation" or "compass" (implying scope) and 模 means "model" or "pattern", together creating the core idea of "scale", "extent", or "format". Thus, the entire formation visually and conceptually stacks 大 ("large") onto 规模 ("scale") to straightforwardly denote "large-scale".