Shakti, Śakti

Śakti (शक्ति) is the "active" aspect of a Hindu deity, the "energy" emanating from it. In the case of Shiva [Śiva], his shakti is feminine, often personified as the goddess Devi, and has three aspects: creative energy (Shakti), peaceful, harmonious space (Pārvatī), destructive as time caan be (Kālī).

Śakti is the all-important goddess of Tantra, in charge of the creation, expansion and destruction of the universe. Puruṣa comes second, yet Śakti cannot accomplish the work of creation of the universe without Puruṣa.