س ع رs-ʿ-r
(ف) سَعَرَ يَسْعَرُ سَعْرًاsaʿara yasʿaru saʿran: (1) to provoke someone; to inflame (2) to kindle a fire.
سَعِيْرٌsaʿīr (adjective on the pattern of فَعِيْلٌfaʿīl): an ever-burning fire; a blazing fire. ﴿فَسُحْقًا لِّاَصْحٰبِ السَّعِيْرِ﴾ (Al-Mulk 67:11)
سُعُرٌsuʿur: flames of fire; also madness. ﴿اِنَّ الْمُجْرِمِيْنَ فِيْ ضَلٰلٍ وَّسُعُرٍ﴾ (Al-Qamar 54:47)
Form II (tafʿīl) سَعَّرَ يُسَعِّرُ تَسْعِيْرًاsaʿʿara yusaʿʿiru tasʿīran: to kindle fiercely. ﴿وَاِذَا الْجَحِيْمُ سُعِّرَتْ﴾ (At-Takwīr 81:12)