ر ی نr-y-n
(ض) رَانَ يَرِيْنُ رَيْنًاrāna yarīnu raynan (original form: رَيَنَrayana): (of rust or filth) to form a layer over something, to overcome. Only once in the Quran: ﴿كَلَّا بَلْ ۜ رَانَ عَلٰى قُلُوْبِهِمْ مَّا كَانُوْا يَكْسِبُوْنَ﴾ (Al-Muṭaffifīn 83:14)
رَيْنٌrayn: rust, the coating that settles on the heart; the lexicographers say رَيْن اُسrayn us is rust that does not come off even with polishing.