To pile up or stack objects one on top of another, making a heap or raising the height.
倉庫に段ボール箱を高く積み上げた。
We stacked cardboard boxes high in the warehouse.
子どもたちは砂で小さな山を積み上げた。
The children piled up a small mound of sand.
レンガを一つずつ丁寧に積み上げる。
Carefully stacking the bricks one by one.
To accumulate experience, achievements, knowledge, etc.; to build up over time.
彼は長年の経験を積み上げて課長になった。
He worked his way up to section chief by accumulating years of experience.
信頼を積み上げるには時間が必要だ。
It takes time to build up trust.
小さな成功を積み上げて大きな目標を達成した。
By building on small successes, they achieved a big goal.