• كُوِّرَتْ
• يُكَوِّرُ

Appears 2 times in the Quran.

1. 39:5 خَلَقَ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضَ بِٱلْحَقِّ يُكَوِّرُ ٱلَّيْلَ عَلَى ٱلنَّهَارِ وَيُكَوِّرُ ٱلنَّهَارَ عَلَى ٱلَّيْلِ وَسَخَّرَ ٱلشَّمْسَ وَٱلْقَمَرَ كُلٌّ يَجْرِى لِأَجَلٍ مُّسَمًّى أَلَا هُوَ ٱلْعَزِيزُ ٱلْغَفَّٰرُ

   He has created the heavens and the earth with the truth; He makes the night cover the day and makes the day overtake the night, and He has made the sun and the moon subservient; each one runs on to an assigned term; now surely He is the Mighty, the great Forgiver.
   

2. 81:1 إِذَا ٱلشَّمْسُ كُوِّرَتْ

   When the sun is covered,