The word "纷纷" is formed through the process of reduplication, where the single character "纷" (fēn), which originally carries meanings related to "numerous," "disorderly," or "profuse," is duplicated to create an intensified and descriptive adverb. This reduplicated form "纷纷" emphasizes a sense of multiplicity and simultaneous, continuous action, often describing how many individual elements or actors are all doing something in a scattered yet collective manner. It commonly functions as an adverbial modifier before a verb, vividly portraying scenes where many things happen one after another or all at once, such as leaves falling, people speaking up, or events occurring in succession. For example, in "落叶纷纷" (luòyè fēnfēn), it paints a picture of leaves falling profusely and everywhere.