The Chinese word **核查 (héchá)** is a compound term formed by combining two characters with related meanings to create a nuanced concept. The first character, **核 (hé)**, carries the core meaning of "to check," "to examine," or "to verify against a standard," often implying a careful, item-by-item review or cross-referencing. The second character, **查 (chá)**, means "to investigate," "to look into," or "to inspect," suggesting a process of searching and scrutinizing. When paired, they reinforce and specify each other, creating a word that means a **formal, thorough, and systematic examination to verify facts or accuracy**, such as an audit, verification, or official check. This formation follows the common Chinese morphological pattern where two synonyms or near-synonyms are combined to express a more precise and formal idea than either character alone.