noun (n)

• the quality of having great facility and competence

  kualitas mempunyai hebat fasilitas dan kemampuan

  source: wordnet30
• skillfulness in the command of fundamentals deriving from practice and familiarity

  skillfulness dalam perintah dari fundamental deriving dari latihannya dan keakraban

  Example:
  Practice greatly improves proficiency.
  

  Synonym:
  technique
  

  source: wordnet30