Luftfyldt

Luftfyldt is a Danish adjective meaning “filled with air.” It is formed from luft, meaning air, and fyldt, the past participle of fylde, meaning filled. The term is used to describe objects or spaces whose form or buoyancy is maintained by trapped air rather than by liquid or solid matter.

The word is common in everyday language and in product descriptions to indicate inflation or buoyancy. Examples include luftfyldte bolde (air-filled balls), luftfyldte madrasser (air mattresses), and other oppustelige møbler or legetøj that rely on air to preserve shape. In general usage, luftfyldt highlights that air serves as the primary filling or structural component.

In more specialised contexts, luftfyldt can describe spaces or cavities that contain air, such as air-filled anatomical or technical spaces. The term can be contrasted with other filling materials, such as vandfyldt (water-filled) or solidfyldt descriptions, depending on the domain.

Linguistically, luftfyldt is primarily used in Danish. The related form luftfylt is sometimes seen in Norwegian, with similar meaning. The concept is easily understood across Scandinavian languages as indicating air-based inflation or containment rather than liquid or solid filling.