淤泥 Traditional form: 淤泥 Pinyin (reading): yūní Definitions: silt sludge ooze Characters: 淤 - mud, sediment; to clog up, to silt up 泥 - mud, earth, clay; plaster, paste Traditional characters: 淤 - mud, sediment; to clog up, to silt up 泥 - mud, earth, clay; plaster, paste