Abstract
Morphology is one of the most important disciplines of Arabic language. It is important and necessary to the student and researcher of the Arabic language. It is the way to understand the sources of Arabic language and, therefore, competes with grammar in importance and stature.
This paper is a study of the morphological researches in Clarification of the Explanation of the Sources of the Thirsty by Ibn Ajta (Dec. 750 AH.). The paper falls into an introduction, five sections and conclusion which sums up the views and findings of the study.