القاموس المحيط

Al-Qamoos Al-Muhit, and Al-Qaboos Al-Masit, the comprehensive dictionary of what was said of the Arabs. The most famous dictionary of the Arabic language ever, as his fame was such that many people after him began to use the word dictionary synonymous with the word dictionary.
By the linguist Majd al-Din Abi Tahir Muhammad bin Yaqoub bin Muhammad bin Ibrahim bin Omar al-Shirazi al-Fayrouzabadi, who died in the year (817 AH).
The way to extract meanings from the surrounding dictionary is to open the chapter on the last letter, then separate the first letter
For example, the word “ayn” opens on the chapter of “nun,” then the chapter on “ayn,” then “yaa.”

As mentioned in the author’s introduction
"...I have excelled in this art in the past, and I have been deeply rooted in it, and I have always served it. For a while, I was looking for a simple, comprehensive book." And it was classified on the Passover and the strays in detail, and when the students looked at me, I began my book called “The Brilliant, the Wonderful Teacher,” “The one who unites the arbitrators and the servants.” They have illuminated the books written on this subject, and illuminated the sparkles of virtue and good manners, and I have added to them additional The wood [the vessel] was filled with it...”