fiber-rich

the compound adjective 'fiber-rich' is a modern nutritional term constructed from two distinct linguistic lineages. the first element, 'fiber', traces back to latin 'fibra', which originally referred to a filament or thread, and by extension, the internal structures of plants and animals. the second element, 'rich', originates from old english, itself derived from a proto-germanic root meaning 'powerful' or 'noble', which semantically broadened to signify abundance. the compound logically combines these elements, with 'rich' acting in its secondary adjectival sense of 'abounding in', to describe food that is abundantly supplied with the thread-like, indigestible plant material known as dietary fiber.

Structure: fiber (dietary fiber) + rich (abundant in) - fiber: from latin 'fibra' (filament, entrails), functioning as the core noun denoting the substance. - rich: from old english 'rīċe' (powerful, wealthy), via proto-germanic rīkijaz, functioning as an adjective meaning 'abundant in' or 'having a lot of'.