Teut. kappe, the summit.

CAP, s. A wooden bowl for containing meat or drink, S.
Ramsay.

Su. G. koppa, cyaphus; Arab. kab, a cup.

Hence, perhaps,

Caps, s. pl. The combs of wild bees, S.

To CAP, v. a.
1. To seize by violence, to lay hold of what is not one's own, S.
2. To seize vessels in a privateering way.
Fountainhall.
3. To entrap, to ensnare.
K. Ja. VI.

Lat. cap-ere, Su. G. kipp-a, rapere.

Caper, s. A pirate; or one who seizes vessels under a letter of marque.
Colvil.

Belg. Su. G. Dan. kapare, a pirate.

To CAP, v. a. To direct one's course at sea.
Douglas.