superfluent
/suːˈpəːflʊənt/ /sjuːˈpəːflʊənt/ /sʊˈpəːflʊənt/Somewhat rare
adjective
1Superfluous; exceeding requirements; unnecessary.
2Abundant, copious.
3Of a liquid: covering or flowing over a surface. Now rare.
4Of communication: having a flowing and elegantly persuasive style or character; (of a person) speaking or writing in fluent or elegant manner.
Origin
Late Middle English; earliest use found in Palladius' De Re Rustica. From classical Latin superfluent-, superfluēns, present participle of superfluere.