Root ج ه ل(j h l) has 9 unique word forms and appears 24 times in the Quran.

English gloss Ignorant, Foolish, Illiterate

Word Translation Occurrences
ٱلۡجَٰهِلِينَ the ignorant 12
بِجَهَٰلَةٖ in ignorance 8
تَجۡهَلُونَ ignorant 8
ٱلۡجَٰهِلِيَّةِ (of the time of) ignorance, (of the times of) ignorance 6
ٱلۡجَٰهِلُونَ ignorant ones, the ignorant ones 4
ٱلۡجَاهِلُ the ignorant one 2
جَهُولٗا ignorant 2
ٱلۡجَٰهِلِيَّةِۖ (of) [the] ignorance 2
جَٰهِلُونَ ignorant 2
يَجۡهَلُونَ (are) ignorant 2