Is it impossible to purify wood that absorbed impure liquid?, i mean bare wood that dont have any coating.

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.

The scholars have different views regarding whether the wood that has absorbed impure liquid and other similar material can be purified or not. Those who are of the view that it cannot be purified, such as Al-Banaani (a Maaliki scholar), have limited the prohibition to using it in acts of worship, such as prayer. In this case, the one who is praying must avoid wearing that material or spreading to pray over it. As for using it to place food in it, for example, or using it for something else, then it can be purified once the impurity has been removed from its surface by cleansing it with water.

Allah Knows best.