fluency

 
Pronunciation: /ˈfluːənsi/

noun

[mass noun]
  • the quality or condition of being fluent, in particular:
  • the ability to speak or write a particular foreign language easily and accurately: fluency in Spanish is essential
  • the ability to express oneself easily and articulately.

Origin:

early 17th century: from Latin fluentia, from fluere 'to flow'