The word 搜索 is formed through the combination of two characters, 搜 and 索, which both independently carry the core meaning of "to search", "to seek", or "to look thoroughly for". This is a classic example of semantic compounding in Chinese, where two synonyms or near-synonyms are paired together to reinforce and clarify a single, unified concept. The first character, 搜, often implies a proactive, probing search (like rummaging), while the second, 索, conveys a more systematic or demanding seeking (as in tracing or demanding an answer). Together, they create a more vivid and comprehensive picture of the act of searching than either character would alone, effectively merging into the modern concept of "to search" or "to scout".