empty-headed

the compound adjective 'empty-headed' is a straightforward metaphorical construction from native english elements. the first element, 'empty', derives from the old english concept of being unoccupied or vacant, which evolved to describe anything lacking substance or content. the second element, 'headed', uses the familiar body part 'head' as the seat of intellect and character, combined with the adjectival suffix '-ed' to indicate possession of a certain type of mind. when combined in the early 18th century, the term literally described someone 'having an empty head', creating a vivid and enduring image for a person perceived as lacking intelligence, seriousness, or common sense.

Structure: empty (lacking) + headed (having a mind or character) empty (from old english ǣmtiġ, ǣmetta, meaning 'at leisure, empty', functioning as an adjective meaning 'containing nothing; devoid of sense'). headed (from old english hēafod, meaning 'head', combined with the suffix -ed, functioning to form an adjective meaning 'having a head or mind of a specified kind').