To pile up or stack things on top of each other (e.g., boxes, books).
引っ越しのために箱を部屋の隅に積んだ。
I stacked the boxes in the corner of the room for the move.
本棚に本をきれいに積んでおいた。
I neatly piled the books on the shelf.
子どもがブロックを高く積んだ。
The child stacked the blocks high.
To load (cargo, luggage, etc.) onto a car, ship, truck, etc.
トラックに家具を積む作業は大変だった。
Loading the furniture into the truck was tough work.
船に貨物を積んで出航した。
They loaded the cargo onto the ship and set sail.
荷物を屋根に積んで長距離を運んだ。
We carried luggage on the roof and drove a long distance.
To acquire or accumulate (e.g., experience, knowledge, points); to build up over time.
若いうちにたくさん経験を積むことが大切だ。
It's important to gain lots of experience while you're young.
彼は現場で技術を積んで一人前になった。
He built up his skills on the job and became competent.
試合で少しずつ得点を積んでいった。
They gradually accumulated points in the match.