debouch

英 [dɪ'baʊtʃ; -'buːʃ] 美[dɪ'bʊʃ]

• vi. （河川向广阔处）流出；进出于（广阔地方）
• vt. 使出来；使流注

1. march out (as from a defile) into open ground;

"The regiments debouched from the valley"

2. pass out or emerge; especially of rivers;

"The tributary debouched into the big river"