Lexical Hypotheses: (Al-Ain) by Al-Khalil as a Model

The research at hand discusses a model of the lexicographers’ hypotheses in which its owners intended to assume words that they didn't proven to be heard, so they remained attached to (if). In this regard, the study intends to treat some of the said words by either breaking down, analysis and composition. Since Al-Ain lexicon is the first nucleus and the good seed from which vo-cabulary lexicons were arose. Lexicons are by nature a field for phonemic, morphological, and syntactic theorizing. I dealt with some of the hypotheses to clarify their nature, and the extent to which they relate to the rules guiding Arabic sciences, Al-Ain lexicon was chosen as it is the pioneer in its chapter and the schools agree with its author's leadership and proficiency. The re-search problem appears through listing words and formulas in the book Al-Ain, that weren't proven to be heard among Arabs. So its author intended to attach them to (if) to be (correct, permissible, or analogy), so it remained vacillating between condition and answer, and between neglect and use, This study included: Introduction: In which I demonstrated the importance of this research, reasons for choosing it, and the objectives the researcher aspires in light of the research questions and hypotheses, Two topics: In which I has discussed the hypotheses in the two chapters of nouns and verbs, Conclusion: it includes the most im-portant findings the researcher reached, This study proved the leadership of Al-Khalil by permitting the derivation from the notable names, his hypotheses were in consistent with the considered rules and guidelines, so it followed the Arabs' measure-ment in its speech, and other find-ings documented in this research.