ف و رf-w-r
(ن) فَارَ يَفُوْرُ فَوْرًاfāra yafūru fawran (original form: فَوَرَ يَفْوُرُfawara yafwuru): to boil, to boil over. ﴿وَفَارَ التَّنُّوْرُ﴾ (Hūd 11:40); ﴿سَمِعُوْا لَهَا شَهِيْقًا وَّهِيَ تَفُوْرُ﴾ (Al-Mulk 67:7)
فَوْرٌfawr (verbal noun, maṣdar, also a noun, ism dhāt): boiling, ebullition; «مِنْ فَوْرِهِمْmin fawrihim» = in that very heat, at once, immediately. ﴿وَيَاْتُوْكُمْ مِّنْ فَوْرِهِمْ هٰذَا﴾ (Āl ʿImrān 3:125)