A bundle bow is a primitive bow made from several reasonably straight sticks (or similar objects) of fairly uniform thickness that are bound together into a bundle.
A bow is a flexible arc which shoots aerodynamic projectiles called arrows. A string joins the two ends of the bow and when the string is drawn back, the ends of the bow are flexed. When the string is released, the potential energy of the flexed stick is transformed into the velocity of the arrow. A bundle bow is a primitive version of a bow that is made of several long and flexible sticks lashed together. Small saplings can be cut and seasoned to make a bundle bow, but a suitable variety of seasoned bamboo may perform a little better because of its comparatively low weight. Old fiberglass fishing rods or tent poles may also be used. The thicker the sticks, the harder it will be to draw the bow.
In Predator, after losing virtually all of his equipment escaping from the Predator, Dutch lashed several long sticks together to create a powerful bundle bow, as well as constructing an array of arrows, including one tipped with a 40mm grenade warhead.