ٱلْأَعْرَابُ أَشَدُّ كُفْرًا وَنِفَاقًا وَأَجْدَرُ أَلَّا يَعْلَمُوا۟ حُدُودَ مَآ أَنزَلَ ٱللَّهُ عَلَىٰ رَسُولِهِۦ ۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌ
Important Words:
اجدر (most apt) is derived from جدر which means, he or it was adapted, apt, suited, competent or worthy. They say جدرہ i.e. he made it or him adapted, apt, competent or worthy. One would say ما اجدرہ بالخیر i.e. how fit or suitable or adapted is he for what is good (Lane & Aqrab).