: able to speak easily and well <He was fluent in Spanish.>
: smooth and correct <She speaks fluent German.>
Word Root of FLUENT
The Latin word fluere, meaning “to flow,” gives us the root flu. Words from the Latin fluere have something to do with flowing. A fluid is a substance that flows and is usually a liquid. When someone is fluent in a language the words flow out of her or him. Anything superfluous, or extra, has flowed forth beyond what is necessary.