4.3.64
अशब्दे यत्खावन्यतरस्याम्
Operational rule vidhi
After a word ending with वर्ग but not meaning a 'letter or word' the affixes यत् and ख are optionally used in the sense of 'who stays there'.
Word by word (padaccheda)
Right context अ- शब्दे saptamī · ekavacanaSubstitute / term य - खौ prathamā · dvivacanaRight context अन्यतरस्याम् saptamī · ekavacana
- 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").
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.
Full reading
अ-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
After a word ending with वर्ग but not meaning a 'letter or word' the affixes यत् and ख are optionally used in the sense of 'who stays there'.
As वासुदेववर्ग्यः (by यत्), वासुदेववर्गीणः, (by ख), and वासुदेववर्गीयः (by छ) ॥ युधिष्ठिरवर्ग्यः वर्गीणः or वर्गीयः ॥
Of course, when the word means 'शब्द' it takes one affix only; i. e. छ; as कवर्गीय वर्णः 'a letter belonging to क class'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.