The exact meaning and interpretation of the word "al-Rahman" requires a literary analysis of this word. There are many opinions about the various structural aspects of the word "al-Rahman" that due to the inseparability of the structural areas from each other, adopting a word in each will lead to a different result in the other area. Therefore, it is necessary to provide a comprehensive analysis of all aspects of the construction of this word and to explain their relationship with each other. This research has dealt with this issue in a descriptive-analytical way. Contrary to the opinion of some, the claim of mute and improvisation nature is rejected for "al-Rahman". Investigating the usages, a new theory for this word under the title of "combination of words" was proved, which is the reason for the existence of two distinct sources of derivation: (1) "Rahma" in its famous meaning; (2) "Rahm" means closeness. The research in the Quranic and narrative usages indicates the use of both descriptive and scientific usages for "al-Rahman". Contrary to popular opinion, the etymology of this word is not limited to exaggeration, and it can also be a suspicious adjective. The types of al and lam are unnecessary appendages in the scientific case, and in the descriptive case, it is a mental or present agreement.