expert

expert is an   Adverb

Definition:

[1] Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful; as, an expert surgeon; expert in chess or archery. A valiant and most expert gentleman. Shak. What practice, howsoe`er expert In fitting aptest words to things . . . Hath power to give thee as thou wert Tennison.

Synonyms: