الولي
كلمة (الولي) في اللغة صفة مشبهة على وزن (فعيل) من الفعل (وَلِيَ)،...
Using money for buying and selling in order to make profit.
"Tijārah" (trade) is transforming money by means of buying and selling in order to gain profits. It is a profession that man practices to earn a living and to multiply and increase one's wealth, such as buying a commodity in order to sell it at a higher price and make profits.
"Tijārah": it is derived from "tajara", which means buying and selling. "Tājir": trader.
To buy something in order to resell it at a profit.