Fluently means speaking a language smoothly, without struggling for words. Speak French fluently, read fluently, fluently bilingual.
Fluency is about flow rather than correctness — somebody can speak fluently and make mistakes, and somebody accurate can be painfully slow. Claiming to speak a language fluently is a strong claim and is made far too readily on job applications. Note fluent, from the Latin for flowing.
1adverbfluentlySpeaking a language smoothly, without struggling for words.
“After two years in Madrid, she spoke Spanish fluently.”
fluently is a manner of speaking.
Latin
fluens — flowing
English
fluent
English, today
fluently
Built from
From fluent + -ly. fluent comes from Latin fluens (“flowing”), present active participle of fluō (“to flow”).
Etymology from Wiktionary, CC BY-SA