淤積

to silt up / silt / sediment / ooze / slurry

silt / river sludge / to silt up / choked with silt / variant of 瘀[yu1]

to amass / to accumulate / to store / measured quantity (such as area of volume) / product (the result of multiplication) / to integrate (math.) / to solve (or integrate) an ordinary differential equation (math.) / old / long-standing