(lit. pillar, pl. arkan) In fiqh, an integral part of an act, such as a transaction, without which the act can not be said to have been performed.
Al-‘ushr
Al-ghunm bi al-ghurm
Al-iman
Al-mata
Mark-Up
Al-’athari
Al-ihsan
Al-muljam
Al-ghail
Haqq al-shufah