The word "满满" is formed through the morphological process of reduplication, where the base adjective "满" (mǎn), meaning "full", is duplicated to create an intensified and more expressive form. This repetition serves to amplify the core meaning, transforming it from a simple state of being full to conveying a sense of complete fullness, abundance, or thorough saturation, often carrying a positive, satisfying, or affectionate connotation. Commonly used in modern colloquial and internet language, it functions as an emphatic adverb or adjective in phrases like "满满的信心" (full of confidence) or "幸福感满满" (brimming with happiness), adding a vivid and emotional layer to the description.