The Chinese word **墨镜 (mòjìng)** for "sunglasses" is formed through semantic compounding, where two independent characters combine to create a new meaning. The first character, **墨 (mò)**, means "ink," evoking the concept of deep blackness or darkness. The second character, **镜 (jìng)**, means "mirror" or "lens." When combined, the compound literally translates to "ink glasses," vividly describing eyewear with dark, tinted lenses designed to block bright sunlight, thus forming a logical and visually descriptive term.