Silt (noun)

1. Fine sand, clay, or other material carried by running water and deposited as a sediment.
2. Fine sedimentary material, typically clay and sand, transported and deposited by running water.

Origin:

Middle english sylt, from old english sylt "muddy ground", of germanic origin.

Examples:

1. The river was clogged with silt.
2. The silt in the riverbed made it difficult for the boats to navigate.
3. The silt in the water made it cloudy.
4. The silt was deposited on the river bank.
5. The silt was used to make bricks.