Paśu is the soul, likened to a tethered animal; pati is the Lord, Śiva; and pāśa is the bond of impurity, karma and māyā. Śaiva Siddhānta’s theology is built on the relation of the three: the Lord, through grace, releases the soul from its bonds.
Paśu, pati, pāśa
The bound soul, the Lord and the bond: the three realities of Śaiva Siddhānta.
Also: Pashu, pati, pasha