(س) رَكِبَ يَرْكَبُ رُكُوْبًا وَمَرْكَبًاrakiba yarkabu rukūban wa-markaban: to mount, to ride on something. ﴿فَاِذَا رَكِبُوْا فِي الْفُلْكِ دَعَوُا اللّٰهَ مُخْلِصِيْنَ لَهُ الدِّيْنَ﴾ (Al-ʿAnkabūt 29:65); ﴿وَالْخَيْلَ وَالْبِغَالَ وَالْحَمِيْرَ لِتَرْكَبُوْهَا﴾ (An-Naḥl 16:8)
رَاكِبٌrākib pl. رَكْبٌ وَرُكْبَانٌrakb wa-rukbān (active participle, ism fāʿil): one who rides, rider; رَكْبٌrakb: a caravan of riders. ﴿وَالرَّكْبُ اَسْفَلَ مِنْكُمْ﴾ (Al-Anfāl 8:42); ﴿فَرِجَالًا اَوْ رُكْبَانًا﴾ (Al-Baqarah 2:239)
رَكُوْبٌrakūb (on the pattern of فَعُوْلٌfaʿūl, in the sense of a passive participle, ism mafʿūl): riding animal, mount. ﴿فَمِنْهَا رَكُوْبُهُمْ وَمِنْهَا يَاْكُلُوْنَ﴾ (Yā Sīn 36:72)
رِكَابٌrikāb: riding camels; also the stirrup, i.e. where the rider places his foot. ﴿فَمَآ اَوْجَفْتُمْ عَلَيْهِ مِنْ خَيْلٍ وَّلَا رِكَابٍ﴾ (Al-Ḥashr 59:6)
Form II (tafʿīl) رَكَّبَ يُرَكِّبُ تَرْكِيْبًاrakkaba yurakkibu tarkīban: to set one thing upon another, to join together in order, to put someone together, to compose. ﴿فِيْٓ اَيِّ صُوْرَةٍ مَّا شَآءَ رَكَّبَكَ﴾ (Al-Infiṭār 82:8)
Form VI (tafāʿul) تَرَاكَبَ يَتَرَاكَبُ تَرَاكُبًاtarākaba yatarākabu tarākuban: to mount upon one another, to become intertwined; مُتَرَاكِبٌmutarākib (active participle, ism fāʿil): piled upon one another, intertwined, clustered. ﴿نُّخْرِجُ مِنْهُ حَبًّا مُّتَرَاكِبًا﴾ (Al-Anʿām 6:99)
Form VIII (iftiʿāl) اِرْتَكَبَ يَرْتَكِبُ اِرْتِكَابًاirtakaba yartakibu irtikāban: to commit a wrong deed or a crime (this verb is not used in the Quran).