The dictionary involves certain dichotomous expressions. These expressions are different in meaning. Each dichotomy forms part of the meaning. For example، “da 'aka” (rub) consists of two dichotomies “ da' ” “a 'k”، then the two “ a 'ein” were combined chronologically without repetition. As for “bar' ama”، it consists of three dichotomies، “bar”، “ra'” “ a'm”; through this idea، the idea is complete.
Ibn Durayed mentioned that the origin the third genemation is dichotomous since “qatta' ” is “qat” for him. He and the linguists didn't pay their attention to the idea of collocating these dichotomies expressions with each other. The linguists mentioned that these expressions agree on the first and second letters or the second and the third. They didn't pay their attention that these two letters are originally of the third gemenation that is lightly chronologically at chronologically collocation as approved in the current research. Then، the linguists mentioned that the third letter when used at the beginning or inserted or at the end of the word، this was without evidence. The view adopted in the current research might be related to the certainty of forming expressions.
The structure of the research consisted of a summary and preface, then the idea of conjugated between binaries, and then we implied the research with examples of conjugated in the tertiary formulas, then above the tertiary.