设备 (shèbèi) is a compound noun meaning 'equipment' or 'facilities' — referring to the tools, machines, instruments, or infrastructure needed to perform a specific function. The first character 设 (shè) means 'to set up' or 'to install', and the second character 备 (bèi) means 'to prepare' or 'to equip'. Together, they literally suggest 'things that have been set up and prepared for use'. This word is broad and neutral in register, commonly used in both formal and everyday contexts.

设备 appears frequently when discussing infrastructure (e.g., school, hospital, or factory equipment), technology (computers, lab devices), transportation (train station facilities), or public services (park restrooms, gym gear). It’s usually uncountable in Chinese and doesn’t take measure words like 个 unless specifying individual items (e.g., 一台设备). It rarely refers to living things or abstract concepts — it’s strictly about tangible, functional hardware or installed systems.