cammock

A common restharrow (Ononis spinosa subsp. maritima, syn. Ononis spinosa), a plant with long, hard, crooked roots.

A Venus comb (Scandix pecten-veneris).

A crooked stick, staff or club.

For, say they, although iron the more it is used the brighter it is, yet silver with much wearing doth waste to nothing; though the cammock the more it is bowed the better it serveth, yet the bow the more it is bent and occupied the worse it waxeth.