The word 登陆 is formed by combining two characters: 登, which means "to ascend" or "to step onto", and 陆, which means "land" or "shore". Together, they create a vivid conceptual image of moving from a body of water upward onto solid ground, literally depicting the act of landing or disembarking. This concrete action naturally extends to metaphorical uses, such as a military landing or, in modern terms, the act of "logging in" to a digital system, which is visualized as stepping onto the virtual "land" of a website or platform.