A master's thesis at the College of Education for Human Sciences, Department of Arabic Language, University of Basra, examined the quadriliteral structures and their appendices in Arabic: a morphological study. The thesis, submitted by student Hasna Wahid Dahouh Ali, aimed to study the quadriliteral structures in Arabic (nouns, verbs, and their appendices) from a morphological perspective. This study examined the historical roots and weights of these structures among ancient and modern scholars, and shed light on their semantic impact, particularly in the Holy Qur'an and in some Arabic poetry in which they appear. The thesis concluded that these structures are important and play an effective role in directing the linguistic context according to their predominant morphological connotations, namely repetition or continuity, disturbance and intense movement, and onomatopoeia
