debouche

1. (military, of a body of soldiers) To enter into battle.Examples: "he debouched by the great high road through the forest, in the rear of the Austrian and Bavarian armies, while General Moreau attacked in front."

2. (hydrology, of a river or stream) To discharge into a larger body of water such as a lake or sea.Examples: "He chose a place called Colmnakill, about six miles farther down the Spey, where a tributary stream, debouching into that river, gave him protection on one side"