Barzakh
Barzakh (Arabic: برزخ, from Persian barzakh, "barrier, partition") is an Arabic word meaning "obstacle", "hindrance", "separation", or "barrier".
Etymology
The Arabic word barzakh is derived from the Persian barzakh, "barrier, partition", which is in its turn traced back to the combination barz+ax(v) ("high existence"), analogous to the Persian word for hell, dūzakh < dūžax(v) ("evil existence").
In The Quran
(23:100) "So that I may do good in what I have left behind." No, it is but a word he is speaking. There is a barrier (Arab. بَرْزَخٌ, barzakhun) to prevent them from going back until the day they are all resurrected.
(55:20) A barrier (Arab. بَرْزَخٌ, barzakhun) is placed between them, which they do not cross.
(25:53) And He is the One Who merges the Two seas: this one is isolated, fresh, and this one is salty, bitter. He made between them a partition and an inviolable barrier (Arab. بَرْزَخًا, barzakhan).
