purify

冥想可以帮助净化心灵。

Meditation helps to ___purify the mind.

他通过慈善工作来净化自己的灵魂。

He tried to ___purify his soul through charity work.

这个空气净化器可以有效净化房间里的空气。

This air purifier can effectively ___purify the air in the room.