Arabic (فاسد) for unsound, invalid, voidable, not viable, foul, or corrupt. It is usually used to describe an act or...

A valid condition, i.e., a contractual stipulation that is permissible (under shari'ah) and binding on the parties to the contract...

A condition / contractual stipulation that renders the contract (aqd) in which it was stipulated a defective contract (i.e., though...