Faculty of Arabic Language, Al-Azhar University, Participant in the Department of Language, Grammar and Morphology, Faculty of Arabic Language, Umm Al-Qura University

It is a research aimed at clarifying the meaning of the ambiguous noun, its types, and its most prominent grammatical provisions, and applying this to the addition section. To be an applied model. Due to the lack of topics that are concerned with the chapter of addition, and an explanation of its types, and to highlight, as I intended that the application should be in the Book of God Almighty; Because this is the honor of being attached to the Book of God, and making good use of the evidence it contains on all grammar rules, and I have limited the research to a preface and two sections: I spoke in the preface about: the meaning of the ambiguous and its most prominent types and expressions, then about its rulings in terms of acquiring syntax or construction. In the first topic: I talked about: a theoretical study of the addition, its meaning, and its types, the most prominent provisions, and the type of addition in the ambiguous noun, and the most prominent provisions that pertain to it foreseen in this brief. Evidence for the Noble Qur’an, and the talk was limited to the ambiguous circumstance and the name of the time, and what came with ambiguity that is neither time nor circumstance, such as one that is deeply ambiguous, or whatever is below that. Then the conclusion: The most prominent results and recommendations of the research were mentioned, by the grace of God, as it was proven from the study that it was not possible to add some ambiguous nouns, such as conditional and interrogative nouns, and relative nouns; In view of the origin of its placement, as it has been proven that the addition with the meanings of the three prepositions (lam, from, in) is correct, it is not correct to deny these meanings or some of them, as it became clear in the statement of the type of the ambiguous addition and what it benefits: it is permissible to add the most ambiguous nouns, without the excessive ambiguity, so adding them is not Purely in the most correct words, and other important results of what was contained in the conclusion of this research. Then I followed this with two indexes, one: for sources and references, which are diverse, and the other: for research topics.