After some 90-years scholars* at The University of Chicago's Oriental Institute have finally completed work on the Assyrian dictionary.
* - The dictionary was actually completed in 2010, but I was just recently reminded of its existence.
Chicago Assyrian Dictionary Project
Originally Posted by Oriental Institute
The Chicago Assyrian Dictionary, initiated in 1921 by James Henry Breasted, is compiling a comprehensive dictionary of the various dialects of Akkadian, the earliest known Semitic language that was recorded on cuneiform texts that date from c. 2400 B.C. to A.D. 100 which were recovered from archaeological excavations of ancient Near Eastern sites. The Assyrian Dictionary is in every sense a joint undertaking of resident and non-resident scholars from around the world who have contributed their time and labor over a period of seventy years to the collection of the source materials and to the publication of the Dictionary.
Got two grand? If so, you can purchase it directly
from the Institute. The set is comprised of 21-volumes, but if you're not quite as well heeled, it can also be downloaded gratis
from the Institute as well.
At any rate it should make all of your fanfiction that much more exciting!