1. water
2. earth
3. sun
4. istiÎÁlah
5. inqilÁb
6. intiqÁl
7. Islam
8. subjection
9. removal of the ayn al-najÁsah
10. the istibrÁÞ of an animal that consumes najÁsah
11. the disappearance of a Muslim
12. release of a normal amount of blood
The detailed rulings for each of these will be explained below.