مَّحْجُور

Appears 2 times in the Quran. (Root: حجر)
  1. On the day when they shall see the angels, there shall be no joy on that day for the guilty, and they shall say: It is a forbidden thing totally prohibited.

  2. And He it is Who has made two seas to flow freely, the one sweet that subdues thirst by its sweetness, and the other salt that burns by its saltness; and between the two He has made a barrier and inviolable obstruction.