ق ط رq-ṭ-r
(ن) قَطَرَ يَقْطُرُ قَطْرًاqaṭara yaqṭuru qaṭran: (1) (of water) to drip drop by drop, to flow (2) to throw someone down on his side. (This verb is not used in the Quran.)
قُطْرٌquṭr pl. اَقْطَارٌaqṭār (noun, ism dhāt): the side, edge of a thing. ﴿وَلَوْ دُخِلَتْ عَلَيْهِمْ مِّنْ اَقْطَارِهَا﴾ (Al-Aḥzāb 33:14)
قِطْرٌqiṭr (noun, ism dhāt): molten copper. ﴿وَاَسَلْنَا لَهُۥ عَيْنَ الْقِطْرِ﴾ (Sabaʾ 34:12)
قَطِرَانٌqaṭirān (noun, ism dhāt): a black, foul-smelling, inflammable resinous substance obtained from certain trees; tar, pitch. ﴿سَرَابِيْلُهُمْ مِّنْ قَطِرَانٍ﴾ (Ibrāhīm 14:50)Note: «قَنَاطِيْرqanāṭīr» (Āl ʿImrān 3:14) is not from this root but from the quadriliteral (rubāʿī) root q-n-ṭ-r.