Sedimenting means the process of small pieces of rocks or dirt settling at the bottom of a liquid.
Sedimenting is a natural process that happens over time. It's like when the dirt in water slowly goes to the bottom.
Examples:
The sand is sedimenting at the bottom of the river.
The rocks are slowly sedimenting in the lake.
The mud is sedimenting in the pond.
The dirt is sedimenting in the glass of water.
The small pieces of rock are sedimenting very slowly.
The heavy rocks are sedimenting quickly.