cop

Cop they use to call / The tops of many hills.

The stature is bowed down in age, the cop is depressed.

[…] the elbow cop or coudiere for the elbow; and the rerebrace or arriere-bras for the upper arm. The shoulder cop, pauldron or epauliere which covered the shoulder, and often a large part of the breast and back, was usually considered a part of the arm guard.