ع ج مʿ-j-m
(ک) عَجُمَ يَعْجُمُ عُجْمَةًʿajuma yaʿjumu ʿujmatan: to have an impediment of speech; to stammer (this verb is not used in the Quran).
اَعْجَمُaʿjamu (adjective on the pattern of اَفْعَلُafʿalu, the pattern for colours and defects, but its plural comes on the patterns of the elative (ism tafḍīl) اَفْعَلُafʿalu, i.e. اَعْجَمُوْنَaʿjamūna and اَعَاجِمُaʿājimu): (1) one who does not express himself clearly, even if an Arab (2) a non-Arab, even if he speaks eloquent Arabic. ﴿وَلَوْ نَزَّلْنٰهُ عَلٰى بَعْضِ الْاَعْجَمِيْنَ﴾ (Ash-Shuʿarāʾ 26:198)
اَعْجَمِيٌّaʿjamiyy (relative adjective, ism nisbah): anything related to non-Arabs. ﴿لِسَانُ الَّذِيْ يُلْحِدُوْنَ اِلَيْهِ اَعْجَمِيٌّ﴾ (An-Naḥl 16:103); ﴿ءَاَعْجَمِيٌّ وَّعَرَبِيٌّ﴾ (Fuṣṣilat 41:44)