Yaska’s Nirukta (BC 700-500) is an ancient treatise on etymology in which he interprets the words of Vedas. He explains synonyms, obscure words and names of Gods and establishes the meaning of Vedas and helps to understand the important Vedic myths contained in the arthavādas. The Aitihasika’s different from the Nirukta’s interpreted the Vedic myths in terms of historical personalities and historical incidences.