The word 检验 is formed by combining two characters, each contributing a core meaning to create a unified concept. The first character, 检 (jiǎn), carries the fundamental idea of examining, inspecting, or checking. The second character, 验 (yàn), carries the meaning of testing, verifying, or proving. When placed together, they sequentially and comprehensively express the process of first inspecting and then verifying the results, thus forming the complete concept of "to test", "to inspect", or "to examine" in a thorough and confirmatory manner.