The word 健忘 (jiànwàng), meaning "forgetful," is a coordinative compound formed by combining two meaningful characters: 健, which originally means "strong" or "healthy," and 忘, which means "to forget." In this specific construction, 健 does not retain its literal meaning but instead acts as an intensifying or descriptive prefix, modifying 忘 to create an adjective describing a *strong tendency* or *habit* of forgetting. This morphological process, where two roots combine to produce a new abstract meaning not strictly derived from a simple sum of its parts, is common in Chinese word formation, resulting in a term that conceptually encapsulates the state of being prone to forgetfulness.