Meaning and elaboration
Meaning: The one who is the power of the auspicious, Lord Shiva.
Elaboration
Shhiva-Shhakta directly translates to "The Shakti (power) of Shiva." This name emphasizes Mahakali's inseparable and primordial connection with Lord Shiva. It presents Her as the dynamic force animating Shiva's transcendent consciousness.
The Inalienable Union In Shaivism and Shaktism, Shiva is the static, transcendental consciousness, while Shakti is the dynamic creative power through which all manifestation appears. Shhiva-Shhakta means that Kali is fundamentally that kinetic force of Shiva. Without Shakti, Shiva is inert (Shava); without Shiva, Shakti lacks Her ultimate ground.
Cosmic Dance of Creation and Dissolution The name points to the cycle of creation, preservation, and dissolution as one living movement. Kali, as Shiva's Shakti, is the force that carries out this transformative dissolution. She is the fierce energy through which everything is returned to ash, so Shiva can remain as pure, undifferentiated consciousness.
Consciousness and Energy Shhiva-Shhakta also expresses the Advaitic truth that consciousness (Shiva) and energy (Shakti) are two aspects of one ultimate reality. Kali is the cinmaya energy of Shiva: dynamic, compassionate, and absolute. She gives form to Shiva's will, and devotion to Shhiva-Shhakta becomes devotion to the unity of awareness and its own power.