de·bouch 
(d
ĭ-bouch
, -b
sh
)
v. de·bouched, de·bouch·ing, de·bouch·es
v.intr.1. To march from a narrow or confined area into the open.
2. To emerge; issue: "His companions still lay in the bed of the ravine, through which the smaller stream debouched" (James Fenimore Cooper).
v.tr. To cause to emerge or issue.
[French déboucher : dé-, out of (from Old French des-; see DE-) + bouche, mouth (from Latin bucca, cheek, mouth).]