accumulate · verb I or T /əˈkjuː.mjə.leɪt/
accumulate
C1 to increase in amount over a period of time, or to make something increase over a period of time
Dictionary example:
The chemicals accumulate in your body.
Learner example:
There's nothing you can do with [the] waste, and that piled-up litter begins to unpleasantly smell as it accumulates in enormous quantities, but what's worse it can be really dangerous as the weather is really hot. (Certificate in Advanced English; C1; Polish)
