The Unani Medicine is a comprehensive medicine and based on certain basic principles i.e. the concept of t.abī‘at, mizāj (temperament) akhlāt (theory of humours), quwā (faculties) and rūh. (pneuma). The whole philosophy of Unani Tibb revolves around these concepts and by understanding these; the complete Unani Tibb can be comprehended. But the understanding of the concept of t.abī‘at among scholars varies from ancient time to present era. Regarding t.abī‘at controversies exist among scholars and people of the community. They criticise the concept due to the lack of understanding and clarity. The aim of this paper is to minimize the level of difference in understanding of this core concept so that it becomes more acceptable and generalised among scholars of Unani Tibb and other systems of medicine. T.abī‘at is the administrative hidden power in the human body which is a matter of prime concern and apprehension for

physicians of Unani Medicine.