profuse (adj.)

early 15c., "lavish, extravagant," from Latin profusus "spread out, lavish, extravagant," literally "poured forth," noun use of past participle of profundere "pour forth," from pro "forth" (from PIE root *per- (1) "forward") + fundere "to pour" (from nasalized form of PIE root *gheu- "to pour"). Meaning "bountiful" is from c. 1600. Related: Profusely; profuseness.