fluency

noun

Etymology: From Late Latin fluentia, equivalent to fluent + -cy. Cognate with French fluence.

1. The quality of smoothness of flow.

   “She has fluency, nobility, / Elegance and symmetry, / Stability, fluidity, / Like poetry in motion.”

2. The quality of being fluent in a language; a person's command of a particular language.
3. The quality of consistently applying skill correctly in the manner of one well-practiced at it, requiring little deliberate thought to perform without mistakes

   “While Gunners boss Arsene Wenger had warned his players against letting the pre-match festivities distract them from the task at hand, they clearly struggled for fluency early on.”

4. The inherent ability to use a language easily and accurately.