The word **步步** is formed through the process of **reduplication**, where the single character **步** (bù), meaning "step," is repeated. This repetition transforms the concrete noun into an adverbial phrase that conveys the manner of an action. Literally meaning "step step," it figuratively expresses the idea of doing something **step by step, gradually, or with each successive move**. This formation is a common grammatical feature in Chinese, where reduplicating a noun often creates a rhythmic and emphatic expression indicating a steady, sequential progression.