This book is an authentic, well researched elucidation of Panini's Dhatupatha, the Roots of the Sanskrit Language. It contains all the 1943 Sanskrit Dhatus in correct Panini order. It also contains versions of some Dhatus appearing in standard Dhatupathas, so that the total count of Dhatus listed is 2056. For each Dhatu, it includes Accents (Dhatu Svara), iii/1 Verb Rupa, and English Meaning. It also gives Ashtadhyayi Sutra Reference for Dhatus that are difficult to derive. A complete Alphabetical Index is supplied that is pleasing formatted to locate any Dhatu easily. Each Dhatu is numbered in correct Panini sequence, so that locating a Dhatu in standard Sanskrit Grammar texts is easy. This is a great help for Libraries, School faculty and serious scholars. For the students in a gurukul system, a section on learning the chanting of the Dhatupatha is provided. Panini was a linguist, grammarian, programmer, sage and visionary, and lived circa 600 BC. His work on Sanskrit Grammar rivals the best computer software and apps available today, and is being recognized as the most complete and practical work in this regard.