Murakkab jarri: a prepositional phrase
مُرَكَّب جَارِّيmurakkab jarri - prepositional phrase
Murakkab jarri is a common Quranic Arabic phrase made from harf jarr and ism majrur.
Simple explanation
مُرَكَّب جَارِّي (murakkab jarri) is made from a حَرْف جَرّ (harf jarr) followed by an اِسْم مَجْرُور (ism majrur).
This phrase family occurs in the Quran more than 13,000 times, so it is one of the quickest structures for learners to recognise.