淤积 Traditional form: 淤積 Pinyin (reading): yūjī Definitions: to silt up silt sediment ooze slurry Characters: 淤 - mud, sediment; to clog up, to silt up 积 - to store up, to amass, to accumulate Traditional characters: 淤 - mud, sediment; to clog up, to silt up 積 - to store up, to amass, to accumulate