7.3.72
क्सस्याचि
Operational rule vidhi
The अ of the Aorist characteristic कस् is elided before an affix beginning with a vowel.
Word by word (padaccheda)
Target क्सस्य ṣaṣṭhī · ekavacanaRight context saptamī · ekavacana
- 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").
Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.
Full reading
क्सस्य
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The अ of the Aorist characteristic कस् is elided before an affix beginning with a vowel.
As अधुक्षाताम्, अधुक्षाथाम्, अधुक्षि from the root दुह् ॥ Had the अ not been elided before आताम् and आथाम्, then इय must have been substituted for it according to 7.2.81. Why do we say before an affix beginning with a vowel? Observe अधुक्षत्, अधुक्षताम् ॥ Why do we say क्स and not only स? So that the elision should not take place here, as उत्सौ, उत्साः, वत्सौ, वत्साः, तृणसौ, तृणसः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.