Sherni Gauhar Khan AT#4 - Page 45

Ca or Caika is the name by which the Supreme Goddess is referred to in Devi Mahatmya. According to Coburn, "Caika is "the violent and impetuous one". In the light of the primacy of this designation of the goddess, it is striking that the word Caka has virtually no earlier history in Sanskrit. There are no instances of its occurrence in the Vedic literature we have surveyed. The epics are similarly barren: neither the Ramayana nor the Mahabharata give evidence of the epithet, although in one of the hymns inserted in the latter Caa and Caare applied to the deity they praised."^[1]

The designation of Chandi or Chandika is used twenty-nine times in the Devi Mahatmya, which is agreed by many scholars to have had originated in Bengal, the primary seat of the Shakta or Goddess tradition and tantric sadhana since ancient times. It is the most common epithet used for the Goddess. In Devi Mahatmya, Chandi, Chandika, Ambika and Durga have been used synonymously.^[2]

Goddess Chandi is associated with the 9 lettered Navakshari Mantra.It is also called Navarna Mantra or Navavarna Mantra. It is one of the principal mantras in Shakti Worship apart from the Sri Vidhya Mantras. It customary to chant this mantra when chanting the Devi Mahatmya.