all-aluminum

The word is a modern compound adjective formed within English. The first element, 'all', is an ancient Germanic intensifier meaning "wholly, completely," tracing back to Proto-Indo-European. The second element, 'aluminum', entered English in the early 19th century, named for the compound alumina, itself from Latin 'alumen' (alum), a substance known since antiquity for its astringent properties. The compound 'all-aluminum' logically combines these parts to specify an object constructed solely from this lightweight, silvery-white metal, emphasizing its material purity and uniformity, a usage common in manufacturing and engineering descriptions.

Structure: all (entirely) + aluminum (a metallic element) 'all' is from Old English 'eall', meaning the whole quantity or extent, functioning as an intensifying prefix. 'aluminum' is the name of the metallic element, derived via 'alumina' from Latin 'alumen', meaning alum.