6.3.95
सहस्य सध्रिः
Operational rule vidhi
If the word 'सह' is followed by an लुप्तप्रत्ययान्त-अञ्च् word, then 'सह' is converted to 'सध्रि'.
Word by word (padaccheda)
Target सहस्य ṣaṣṭhī · ekavacanaSubstitute / term सध्रिः prathamā · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Full reading
सहस्य सध्रिः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
सहस्य → सध्रिः
Replace sahasya with sadhriḥ. Inherited words (anuvṛtti) may add further conditions.
Commentary
सघ्रि is the substitute of सह before अञ्च् when no affix (or व affix) follows.
Thus सध्य्रङ्, सध्य्रञ्चौ, सध्य्रञ्चः; and सध्रीचः, सध्रीचा ॥ See 6.3.138 for long vowel.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.