1 integral (calculus)

2 accumulated points (in sports, at school etc)

3 total credits earned by student

4 bonus points in a benefit scheme

1 active

2 energetic

3 vigorous

4 positive (outlook)

5 proactive

1 to accumulate

2 accumulation

3 cumulative

4 cumulatively

1 area (of a floor, piece of land etc)

2 surface area

3 tract of land

1 official reserves

2 accumulated fund

1 lit. to have accumulated knowledge and deliver it slowly (idiom)

2 good preparation is the key to success

3 to be well prepared

1 lit. to put a fire under a pile of firewood (idiom)

2 fig. hidden danger

3 imminent danger

1 to pile up like a mountain (idiom)

2 a mountain of (paperwork etc)

3 a large number of sth

1 always at loggerheads (idiom); never able to agree with sb

2 unable to get on with sb

1 to accumulate work causes sickness (idiom); to fall ill from constant overwork