up silt sth up | ˌsilt ˈup
to block sth with silt ; to become blocked with silt :
Sand has silted up the river delta.
The harbour has now silted up.
up silt sth up | ˌsilt ˈup
to block sth with silt ; to become blocked with silt :
Sand has silted up the river delta.
The harbour has now silted up.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005