(ن) فَجَرَ يَفْجُرُ فَجْرًا وَفُجُوْرًاfajara yafjuru fajran wa-fujūran: (1) to split something open and let water flow (2) to break the limits set by God and follow one's own will, to disobey. ﴿حَتّٰى تَفْجُرَ لَنَا مِنَ الْاَرْضِ يَنْۢبُوْعًا﴾ (Al-Isrāʾ 17:90); ﴿بَلْ يُرِيْدُ الْاِنْسَانُ لِيَفْجُرَ اَمَامَهُۥ﴾ (Al-Qiyāmah 75:5)
فَجْرٌfajr (also as a noun of time (ẓarf)): the time when light breaks through the darkness of night, dawn. ﴿وَالْفَجْرِ﴾ (Al-Fajr 89:1)
فُجُوْرٌfujūr (also a noun (ism dhāt)): disobedience, wickedness. ﴿فَاَلْهَمَهَا فُجُوْرَهَا وَتَقْوٰىهَا﴾ (Ash-Shams 91:8)
فَاجِرٌfājir pl. فٰجِرُوْنَ وَفُجَّارٌ وَفَجَرَةٌfājirūna wa-fujjār wa-fajarah (active participle (ism fāʿil)): disobedient, wicked. ﴿وَاِنَّ الْفُجَّارَ لَفِيْ جَحِيْمٍ﴾ (Al-Infiṭār 82:14)
Form II (tafʿīl) فَجَّرَ يُفَجِّرُ تَفْجِيْرًاfajjara yufajjiru tafjīran: to split open thoroughly and make flow. ﴿وَفَجَّرْنَا الْاَرْضَ عُيُوْنًا﴾ (Al-Qamar 54:12)
Form V (tafaʿʿul) تَفَجَّرَ يَتَفَجَّرُ تَفَجُّرًاtafajjara yatafajjaru tafajjuran: to gush forth forcefully. ﴿وَاِنَّ مِنَ الْحِجَارَةِ لَمَا يَتَفَجَّرُ مِنْهُ الْاَنْهٰرُ﴾ (Al-Baqarah 2:74)
Form VII (infiʿāl) اِنْفَجَرَ يَنْفَجِرُ اِنْفِجَارًاinfajara yanfajiru infijāran: to gush forth (freely). ﴿فَانْفَجَرَتْ مِنْهُ اثْنَتَا عَشْرَةَ عَيْنًا﴾ (Al-Baqarah 2:60)