IPA: /sɪlˈteɪʃən/
KK: /sɪlˈteɪʃən/
The process of water-borne silt accumulating in a body of water, which is usually not wanted.
The siltation in the river made it difficult for fish to thrive.
Siltation → It is formed from "silt" (from Old English *silt*, meaning fine sand or sediment) and "-ation" (a suffix used to form nouns indicating an action or process). The word "siltation" refers to the process of sediment accumulating, particularly in bodies of water.
Think of fine sand or sediment ('silt') accumulating in a process ('-ation') — that's what siltation means.