Perfected; sharpened (5)
I believe the answer is:
honed
I believe this is a double definition.
'perfected' is the first definition.
('hone' can be a synonym of 'perfect')
'sharpened' is the second definition.
(honing is a kind of sharpening)
(Other definitions for honed that I've seen before include "Refined" , "Sharpened with a stone" , "Perfected" .)