The word 步入 is a compound verb formed by combining two characters: 步 (bù), meaning "step" or "pace", and 入 (rù), meaning "to enter" or "to go into". Together, they create a metaphorical meaning of "to step into", signifying the commencement of a new stage, state, or realm. It is most commonly used in abstract contexts, such as 步入社会 (step into society), 步入新时代 (enter a new era), or 步入正轨 (get on the right track), where it conveys a formal or deliberate transition from one condition to another.