debouch

Etymology
From ( + ), modelled on Italian.

Noun

 * 1)  A narrow outlet from which a body of water pours.
 * 2)  A fortress at the end of a defile.
 * 1)  A fortress at the end of a defile.

Verb

 * 1)  To pour forth from a narrow opening; to emerge from a narrow place like a defile into open country or a wider space.