ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: fret (IV) + work
1.
a. : decoration consisting of work carved, pierced, or otherwise adorned with frets
b. : ornamental openwork or work in relief especially when elaborate or intricate
2. : something suggesting intricate fretwork
the fretwork of shade and sunshine — T.B.Macaulay
the fretwork of trees — Ellen Glasgow