mouth

MOUTH noun

[ C ] uk/maʊθ/ us
A1 the part of the face that is used for eating and speaking

рот
  mouth of a cave/tunnel, etc
the opening or entrance of a cave/tunnel, etc

вход в пещеру/тоннель и т. д.
  mouth of a river
where a river goes into the sea

устье реки
Смотрите такжеbutter wouldn't melt in sb's mouth