the word is a modern english compound adjective. 'vitamin' itself is a 20th-century coinage, blending the latin 'vita' for 'life' with the term 'amine,' as the first identified substances were thought to be amines essential for life. the second element, 'rich,' originates from old english 'rīċe,' which carried meanings of power and wealth. when combined as a suffix, 'rich' evolved to denote an abundance or high concentration of a particular substance. thus, 'vitamin-rich' logically describes a substance that is abundantly supplied with these life-essential organic compounds.

Structure: vitamin (organic compound) + rich (abundant) vitamin: from latin 'vita' (life) and english 'amine' (a chemical compound), functioning as the core noun. rich: from old english 'rīċe' (powerful, wealthy), functioning as an adjective-forming suffix meaning 'full of' or 'abundant in'.