Pile up
堆 + accumulation
Core meaning family for piling, stacking, or accumulating.
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堆has 2 distinct senses for the same pronunciation

Core meaning family for piling, stacking, or accumulating.
Earth (土) piled high by birds (隹) — a heap or mound of things gathered together.
pile up; heap up; accumulate
The warehouse is full of goods.
He piled the books on the table.
The workers are stacking bricks to build a wall.
Many documents are piled up on the desk.
The firewood in the bonfire crackled.
Explore characters by relationship
Characters from the same exam level.
Characters pronounced "dui".
Characters with radical "土".