Sanskrit has many complex phonological processes, called sandhi, that alter sounds due to the presence of neighboring sounds at morpheme or word boundaries. See Shiksha for a more thorough discussion of the sounds of Sanskrit.
↑ अआइIn its time, Sanskrit was transmitted orally only. Traditionally, the various languages of India each used their local Brahmic script script for writing Sanskrit. In the past few centuries, Devanagari has come to be used as the default script for Sanskrit.