[] to gradually increase over a period of time （逐渐）增长，增加◆The deadline for repayment passed, and interest charges began to accumulate. 偿还款项的截止日期已过，利息费用开始累计增加。
[] to gradually get more of something over a period of time 积累；积聚◆My savings are accumulating interest. 我的储蓄正在生息。SYNaccrue