glass-bottomed

The word is a modern English compound adjective formed from three native English elements. The first element, 'glass', has Germanic origins, referring to the transparent material known since antiquity. The second, 'bottom', is also of Germanic origin, denoting the lowest supporting surface. The suffix '-ed' is added to the noun 'glass-bottom' to create an adjective meaning 'furnished with or having a glass bottom'. This specific construction logically and transparently describes a vessel or structure whose lower section is made of glass, enabling visibility beneath it, a concept that emerged with leisure and tourism activities like reef viewing.

Structure: glass (material) + bottom (lower part) + ed (adjective suffix) - glass: From Old English 'glæs', meaning a hard, brittle, transparent substance. In this compound, it specifies the material. - bottom: From Old English 'botm', meaning the lowest part or foundation. In this compound, it refers to the base of a vessel. - ed: A suffix of Old English origin used to form adjectives from nouns, meaning 'having' or 'provided with'.