This research focuses on the thought of Abū al-Qāsim al-Zajjājī and his contributions in naḥwu. By using descriptive qualitative approach, it was found that al-Zajjājī, who lived third fourth centuries Hijriyah Baghdad, with style “khalaṭa al-madhabayn” tradition, compromised Basrah Kufah schools, other terms, selection (ikhtiyār) choice (intikhāb) opinions predecessors. Such traditions have a ...