ع ص بʿ-ṣ-b
(ض) عَصَبَ يَعْصِبُ عَصْبًاʿaṣaba yaʿṣibu ʿaṣban: to twist a rope so as to strengthen it, to make firm. (this verb is not used in the Quran).
عُصْبَةٌʿuṣbah: a group whose members are closely bound to one another, i.e. who support and help each other; a strong and powerful band. ﴿لَئِنْ اَكَلَهُ الذِّئْبُ وَنَحْنُ عُصْبَةٌ﴾ (Yūsuf 12:14); ﴿اِنَّ الَّذِيْنَ جَآءُوْ بِالْاِفْكِ عُصْبَةٌ مِّنْكُمْ﴾ (An-Nūr 24:11)
عَصِيْبٌʿaṣīb (adjective on the pattern of فَعِيْلٌfaʿīl): hard, severe. ﴿وَقَالَ هٰذَا يَوْمٌ عَصِيْبٌ﴾ (Hūd 11:77)
Form V (tafaʿʿul) تَعَصَّبَ يَتَعَصَّبُ تَعَصُّبًاtaʿaṣṣaba yataʿaṣṣabu taʿaṣṣuban: to take the side of one's people or group unjustly; to be partisan (this verb is not used in the Quran).