ف ر جf-r-j
(ن) فَرَجَ يَفْرُجُ فَرْجًاfaraja yafruju farjan: to make a split in something, to produce a crack. Passive voice: ﴿وَاِذَا السَّمَآءُ فُرِجَتْ﴾ (Al-Mursalāt 77:9)
فَرْجٌfarj pl. فُرُوْجٌfurūj (also a noun (ism dhāt)): a split, a crack. ﴿وَمَا لَهَا مِنْ فُرُوْجٍ﴾ (Qāf 50:6); then metonymically for the private parts of a human being, and hence chastity. ﴿وَالَّذِيْنَ هُمْ لِفُرُوْجِهِمْ حٰفِظُوْنَ﴾ (Al-Muʾminūn 23:5)