Developing a guide for (The Book of the [Letter] 'Ayn) is a fascinating journey into the roots of Arabic lexicography. Compiled in the 8th century by al-Khalil ibn Ahmad al-Farahidi , it is recognized as the first dictionary of the Arabic language.
If you need the data from Kitab Al Ayn but cannot read Arabic, rely on later dictionaries that borrowed heavily from it but have English translations: Kitab Al Ayn English Pdf