eyelid

The word 'eyelid' is a transparent compound formed from two native English words, 'eye' and 'lid'. Its logic is perfectly literal: it is the cover for the eye. Both elements trace back to ancient Proto-Indo-European roots: okw- ("to see") for 'eye' and klei- ("to lean") for 'lid', the latter via the sense of a movable cover that leans or swings over an opening. The Old English terms ēage and hlid combined naturally in the Germanic tradition of creating descriptive compound nouns. This straightforward naming convention has persisted for over a millennium, resulting in a modern word whose meaning is immediately clear from its components.

Structure: eye (organ of sight) + lid (cover) - eye: From Old English ēage, meaning "organ of sight". A Germanic root of Proto-Indo-European origin. - lid: From Old English hlid, meaning "cover, opening, gate". A Germanic root of Proto-Indo-European origin.