8.3.117
सुनोतेः स्यसनोः
Operational rule vidhi
The ष् substitution does not take place in the स् of सु (सुनोति) in the Future, Conditional and Desiderative.
Word by word (padaccheda)
Target सुनोतेः ṣaṣṭhī · ekavacanaRight context स्य- सनोः saptamī · dvivacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
Full reading
सुनोतेः स्य-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The ष् substitution does not take place in the स् of सु (सुनोति) in the Future, Conditional and Desiderative.
Thus :- अभिसोष्यति, परिसोष्यति, अभ्यसोष्यत्, पर्यसोष्यत् ॥
What example will you give under Desiderative? सुसूषति ॥ This is not a valid example, for by 8.3.61, the reduplicate will not be changed here. Then we shall give the example अभिसुसूषते ॥ This is not also a proper example, for it is governed by the restrictive rule of 8.3.64. Then this is the example of अभिसुसूः, निसुसू derived from the desiderative root अभिसुसूषति by the affix क्विप् ॥ Here the desiderative affix सन् is not changed to ष 8.3.61 and therefore the second स would have been changed to ष as it comes after a reduplicate.
Why do we say before स्य and सन् ॥ Observe सुषाव ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.