The word 大型 is formed through the direct semantic combination of its two component characters: 大 (dà), meaning "big" or "large", and 型 (xíng), meaning "model", "type", or "pattern". The formation is conceptually straightforward, where the first character descriptively modifies the second, fusing into a single compound idea that conveys "large-type" or "large-scale", effectively describing something as being of a big model or substantial size.