silt; sedimentary mud
Refers to fine sediment deposited by water, often in rivers, lakes, or harbors. Used in geological, environmental, and engineering contexts.
A thick layer of silt has accumulated at the bottom of the dam.
Compound of 沈 (ちん, 'to sink') and 泥 (でい, 'mud'), literally 'sinking mud'. The reading ちんでい follows standard on'yomi.