Sadashiva is the one of the forms of Lord Shiva. It is believed that Sadashiva is the highest form of Lord Shiva, which has which depicts a deeper philosophy of spiritualism, humanism and existence of God.
The form of Sadashiva is also known with the other names like Paramashiva and Parameshwara, both of them giving the same meaning of what Sadashiva means.
Lord Sadashiva particularly signifies the five powers of Lord Shiva, the prominent one being the power of revealing the grace. The Lord Sadashivam is believed to exist in five faces, each facing one direction. The face Looking upward is Ishana, the one facing east is Tatpurusha, the one facing westward is Sadyojata, Northward is Vamadeva and the one facing southward is Aghora.
Maha is a term used in Sanskrit to add more value or weight to the existing event or entity, which means Grand or Great. Here, Mahasadashivam is adding more grandeur to the main essence of Sadashivam. The Lord Mahasadashivamurthi is believed to have countless number of faces and arms.
Sadashiva’s presence has been in felt in many Slokas related to Lord Shiva. It is mentioned in one of such Slokas of Namakam Chamakam. Sadashiva has also several implications. The word ‘Sada’ means also forever and it is also observed that the word ‘Sada’ has the roots from the ‘Sath’, which means Good. And the terms like ‘Sadashiva’ and ‘Sadananda’, which mean Lord of Good deeds and Lord of Pleasure and Happiness, originate from ‘Sath’. Thus, Sadashiva is the lord who remains always in the souls of Beings, routing them to Good deeds, Happiness and Pleasure.