积

积

"积" means "to accumulate" or "to amass."

In this sentence, '积累' (accumulate) uses '积' to mean 'to gather or accumulate over time'.

他每天都在努力积累经验。

He works hard every day to accumulate experience.

Here, '积满' (to fill up) utilizes '积' to imply 'to gather or fill' spatially.

阳光从窗户照进来，积满了整个房间。

The sunlight streams in through the window, filling up the entire room.

In this case, '积雪' (accumulated snow) uses '积' in the meaning of 'gathering or accumulation' in a physical sense.

这片土地的积雪已经融化了。

The accumulated snow on this land has already melted.