The Chinese word **眼珠** (yǎnzhū, meaning "eyeball") is a compound noun formed through semantic combination, where the first character **眼** (yǎn) means "eye" and the second character **珠** (zhū) means "pearl" or "bead." The term is constructed using a metaphor, comparing the round, shiny pupil and iris of the eye to a precious pearl, thus creating a vivid and descriptive compound that literally translates to "eye pearl." This type of word formation is common in Chinese, where two independent morphemes are combined to produce a new, figurative meaning that is immediately understandable to native speakers.