It means...

It means, "Acquired impurity" as opposed to 'ayn najis which means "inherent impurity". It is permissible to deal in mutanajjis items if there is a permissible use for it. For example, if lamp oil becomes najis, it can still be used to light the lamp. Hoarding Common Food Items ''Hoarding" means storing an item that is in demand with the hope that its price will increase. It is haram to hoard the common food items that are low in supply and high in demand.

(s.a.w) said, “None hoards the food items except the sinner.”[^4] Under an Islamic system, the government has the right to force such a merchant to sell the food items at the fair market value. According to some Shii scholars, it is also recommended to refrain from boarding any non-food commodity that is considered as a necessity of life for people.

Tools and Machines for Haram Purposes Manufacturing or dealing in items, tools or machines that are exclusively used for haram purposes is absolutely forbidden. For example: gambling machine, idols, etc. Similarly, it is forbidden for a Muslim builder or contractor to build a place of worship for non-Muslims in a non-Muslim country. Question : Is it permissible to work as a cashier in such a convenience store that also sells lottery tickets? Answer : Selling lottery is haram.

However, working as a cashier in a convenient store is not haram even though it is haram to sell lottery tickets.

(The implication is that even thought the cashier's job is legitimate but that portion of the salary which represents the percentage of work done in selling lottery tickets will not be considered legitimate.) However, there is no problem in dealing in machines of dual- or multi-purpose nature which include haram purposes but are not exclusively used for such things, like radio, television, etc. [^1]: Al-Majlisi, Biharu ‘l-Anwar, vol.79, p.126; al-Hindi, Kanzu ‘l-‘Ummal, hadith no.13191.

[^2]: However, according to Ayatullah Sistani, it is permissible to trade in such items with non-Muslims based on the principles of “raf’u ‘l-yad”. According to Ayatullah Makarim Shirazi also this is permissible since he does not consider the hide or byproducts slaughtered (even in a non-Islamic manner) as najis/ritually impure. [^3]: However, according to Ayatullah Sistani, it is permissible to trade in such items with non-Muslims based on the principle of “raf’u ‘l-yad”.