Profuse is from Latin profusus ('lavish, extravagant, poured forth'), past participle of profundere ('to pour forth'), from pro- ('forth') + fundere ('to pour'). Important recorded forms include profundere (Latin) and fundere (Latin). Morphologically, the word preserves a built structure whose named elements carry the historical sense into English. The modern sense remains close to that composition, with the parts narrowing into a single lexical item. In current use it covers produced or given in great abundance; lavish. The wider family includes derived forms such as profusely, profuseness, and profusion and related words such as fuse, confuse, diffuse, and effuse.