The College of Education for Human Sciences discussed the master's thesis entitled "The morphological delusion of Ibn Sayda (d. 458 AH) in the lexicon of Al-Mukhasas, the arbitrator, and the Greatest Ocean", by student Laila Abbas Omar, and supervised by Prof. Dr. Nabila Shukr Khurshid. The study aimed to clarify the concept of delusion linguistically and idiomatically and the concept of morphological delusion, the terms indicating it, and the causes of delusion, as well as addressing the issues of morphological delusion according to Ibn Sayyida. In the past and in the present, they brought up many issues that deviated from the measurements of the Arabic language.