Iʿtikāf
Iʿtikāf (Arabic: اعتكاف, also i'tikaaf or e'tikaaf) is an Islamic practice in which a person secludes himself or herself in a mosque for a period of time, devoting the days to worship and staying away from worldly affairs. The word derives from the Arabic root ʿ-k-f (ع-ك-ف), meaning to adhere, cling, or devote oneself to something. The practice is especially associated with the last ten days of Ramadan, during which the Islamic prophet Muhammad is reported to have regularly withdrawn into the mosque seeking Laylat al-Qadr (the Night of Decree).