silt
noun /sɪlt/
  /sɪlt/
[uncountable]- sand, mud, etc. that is carried by flowing water and is left at the mouth of a river or in a harbour- The wreck was covered in a fine layer of silt.
- The tunnel had been blocked with silt.
 Oxford Collocations Dictionaryadjective- fine
 - deposit
- layer
 - deposit
- remove
- be covered in
- …
 - deposit
 - with silt
 Word Originlate Middle English: probably originally denoting a salty deposit and of Scandinavian origin, related to Danish and Norwegian sylt ‘salt marsh’, also to salt.