适配 (shì pèi) literally combines 适 (shì, 'suitable' or 'appropriate') and 配 (pèi, 'to match' or 'to pair'), meaning 'compatible' or 'well-matched'. It is most commonly used in technical and functional contexts — especially in computing, electronics, and medical devices — to indicate that two systems, components, or products are designed to work together seamlessly. For example, a software update may be described as 适配 the latest operating system, meaning it has been tested and adjusted to function correctly with it.

Unlike general terms like 合适 (suitable), 适配 emphasizes functional interoperability and deliberate engineering alignment. It’s often used passively (e.g., 已适配) or in compound phrases like 适配器 (adapter) or 系统适配 (system compatibility). While occasionally used metaphorically (e.g., for personality or lifestyle fit), its core usage remains technical and precise, carrying a connotation of intentional, tested compatibility rather than mere suitability.