The word 开启 is formed by combining two characters with closely related meanings to create a unified, more expressive concept. The first character, 开 (kāi), primarily means "to open" in a physical sense, like a door. The second, 启 (qǐ), carries the meaning of "to start", "to initiate", or "to enlighten". When placed together, they do not represent two separate actions but fuse into a single compound idea that encompasses both the physical act of opening and the abstract act of commencing or activating something, such as opening a program (启动软件) or opening an era (开启时代). The formation is essentially a semantic combination where both components reinforce and enrich the core notion of initiating an open state.