Takfir

Form of excommunication in Islam

Takfir is an Arabic and Islamic term which denotes excommunication from Islam of one Muslim by another, i.e. accusing another Muslim to be an apostate. The word is found neither in the Quran nor in the ḥadīth literature; instead, kufr ("unbelief") and kāfir ("unbeliever") and other terms employing the same triliteral root k-f-r appear.

This keyword could refer to multiple things. Here are some suggestions: