shankpiece

shank·piece

 (shăngk′pēs′)
n.
An arch support inserted into the shank of a shoe.

shankpiece

(ˈʃæŋkˌpiːs)
n
the inner sole or arch support in the shank of a shoe

shank•piece

(ˈʃæŋkˌpis)

n.
a piece of metal or fiber for giving form to the shank of a shoe. Also called shank.
[1880–85]