The Chinese word 主机 (zhǔjī) is a compound noun formed through semantic combination, where 主 (zhǔ) means "main" or "master" and 机 (jī) means "machine" or "engine". Together, they create a meaning of a primary or central machine, which in modern usage most commonly refers to a computer mainframe, a host computer (in networking), a gaming console, or the main unit of a personal computer. This follows a typical Chinese word-formation pattern where two meaningful characters are joined to specify a new, more complex concept, here, distinguishing the central machine from its peripheral devices.