Sanskrit can be called as a "language of consciousness", may be because it opens the door to India's rich spiritual literature. Sanskrit is not restricted to spirituality & religion, however, but also encompasses a vast literature of many genres; and for us to understand the beauty behind those copious beautiful texts, learning the Sanskrit language is a must.
Sanskrit, which was a primary language of communication in ancient India, lives on in modern India, though not in its full form: it survives in bits and pieces, in one way or another, in the various Indian languages that have descended from it. For natives of India, therefore, it is a matter of recapitulation of a language, which is present in them and merely seeking a proper channel.
Unlike English and other modern European languages, Sanskrit seems somewhat difficult to understand for most Westerners. This is true not only because of its script (devanagari), which is quite foreign to Western & European countries, but also because of its grammatically complex structure and highly inflected forms, which can be more richly inflected even than Greek or Latin, particularly the verbal conjugations.
Sanskrit Dictionary complete PDF download
Online Dictionary
Sanskrit Documents