stockade

Concise Oxford English Dictionary © 2008 Oxford University Press:
stockade/stɒˈkeɪd/

▶noun

• 1 a barrier or enclosure formed from upright wooden posts or stakes.

• 2 chiefly N. Amer. a military prison.

▶verb enclose with a stockade.

– derivatives
stockaded adjective.

– origin C17: shortening of obs. Fr. estocade, alt. of estacade, from Sp. estacada, from the Gmc base of stake1.