onionskin

the word 'onionskin' is a transparent compound formed from two old english elements. 'onion' itself has a complex history, entering english from latin 'unio', which referred to both a pearl and the onion, likely due to the layered, unified structure of both objects. 'skin' is a native germanic word, from old english 'scinn', referring to a covering or peel. the compound directly and logically describes the thin, papery outer layer of the onion. this literal meaning was later applied metaphorically to a type of very thin, durable paper that resembles the texture and translucency of dried onion skin, completing its semantic journey from a botanical descriptor to a specific stationery term.

Structure: onion + skin onion (from middle english union, via anglo-french from latin unio, meaning 'onion, pearl, unity'); skin (from old english scinn, meaning 'animal hide, peel').