The word 符合 is formed through the conceptual blending of two vivid images: the first character 符 originally refers to a tally or token (like a bamboo slip split in two as a proof of authority), representing a standard or a counterpart meant to match; the second character 合 depicts a lid closing snugly on a container, representing joining, closing, or fitting together. Thus, the compound visually and notionally synthesizes the idea of two separate parts (like the two halves of a tally) coming together to form a perfect, verifiable alignment, hence meaning "to accord with" or "to tally with".