The affix tātil comes in the chandas (Vedas) after the words 1. śiva 2. śam and 3. ariṣṭa in the Genitive 6th-Case in construction, the sense being that of condition.,
Thus शिवस्य भावः = शिवतातिः 'the condition of blissfulness'. शन्तातिः 'the state of happiness or peace', अरिष्टतातिः ॥ Here these words have the force of Verbal noun.,