Parvati

Pravati the name is translated to be belonging to the mountains, where pravat means mountain. She is the daughter of the King Himavan (lord of the mountaints. Parvati is more commonly known as wife or consort of the lord shiva, she is the goddess of power(Shakti). She have many forms, mostly wrathful like Durga, Kali, Jagadamba, Maha Devi, Tara Chandi and the Dash Mahavidya( Ten Great Wisdom). She is how ever the second wife of shiva, but she is believed to be the re Incarnation of the first Wife Maha sati who sacrifice herself in the flames when she could not bare the insult of her husband by her father Hiranyakasab.

She is also mother to Ganesha, Kartikeya, and Ashoka Sundari. While Some communities also believe her to be sister of Vishnu.

She is also known by 108 names from the Durga Saptashati. These include Durga (invincible), Shakti (power), Ambika ('dear mother'), Gauri ('fair complexioned'), Bhairavi ('ferocious'), Kali ('dark'), Uma, Lalita, Mataji ('revered mother'), Sahana ('pure'), Maheshwari ('great goddess'). Bhavani, Shivaradni ('Queen of Shiva'), and many hundreds of others. The Lalita sahasranama contains an authoritative listing of 1,000 names of Parvati.

Source of Power
Parvati represent all form of power or energy. It is believed when shiva lost his first wife he went to a massive depression, in a nearly a Shava(Dead Body / Corpse) It is also believed that without her, Shiva remains as Shava or Corpse, for she is the ultimate source of power for all beings, gods and Devas. She brought back shiva from that Shava(Corpse)mode to Shiva.

That is why she is considered as goddess of power. Indeed, she is most powerful of all. When her anger reaches its peak, she can destroy the whole universe, gods and Trimurti in just seconds. Even Trinity i.e. Brahma, Vishnu and Shiva, never try to make her angry at any cost.