abatis

noun

1. a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy
   Terjemahkan ke Indonesia sumber: wordnet30
2. A means of defense formed by felled trees, the ends of whose branches are sharpened and directed outwards, or against the enemy.
   Terjemahkan ke Indonesia sumber: webster1913