積壓

to pile up / to accumulate without being dealt with

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

to press / to push down / to keep under (control) / pressure

see 壓根兒|压根儿[ya4 gen1 r5]