Shastra
Shastra is a Sanskrit word used to denote education/knowledge in a general sense. The word is generally used as a suffix in the context of technical or specialised knowledge in a defined area of practice. For example, Astra shastra means, knowledge about "Handling of weapons", Astra means weapons, and Shastra is their knowledge.Extending this meaning, the shastra is commonly used to mean a treatise or text written in explanation of some idea. In Buddhism, a shastra is often a commentary written at a later date to explain an earlier scripture or sutra.