7.1.97
विभाषा तृतीयादिष्वचि
Operational rule vidhi तृज्वदतिदेशः
The word क्रोष्टु optionally behaves like a तृच्-प्रत्ययान्त word when followed by an अजादि विभक्ति of तृतीया onwards.
Word by word (padaccheda)
Substitute / term prathamā · ekavacanaRight context तृतीयादिषु saptamī · bahuvacanaRight context saptamī · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- 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
तृतीयादिषु
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
क्रोष्टु 'a jackal' may be treated as क्रोष्टृ before the endings beginning with a vowel, in the Instrumental -3rd case and the cases that follow it.
As क्रोष्ट्रा꣡ or क्रोष्टुना, क्रोष्ट्रे꣡ or क्रोष्टवे, क्रोष्टुः꣡ or क्रोष्टोः, क्रोष्ट꣡रि or क्रोष्टौ, क्रोष्ट्रोः꣡ or क्रोष्ट्वोः ॥ But क्रोष्टून् in the Accusative Plural, and क्रोष्टुभ्यां before consonant-beginning affixes.
Vart:- नुम् and नुट् augments come in supersession of the Trich-vad-bhava ordained by the preceding sutras. Thus the Dative of the Neuter noun प्रियक्रोष्टु will be प्रियक्रोष्टुनेऽरण्याय, हितक्रोष्टुने वृषलकुलाय, and not क्रोष्ट्रे ॥ Similarly with नुट्, as क्रोष्टूनाम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.