7.2.37
ग्रहोऽलिटि दीर्घः
Operational rule vidhi
The augment इट् added to वलादि आर्धधातुक affixes, becomes lengthened, except in the personal endings of the लिट् (Perfect Tense), after the root ग्रह.
Word by word (padaccheda)
Left context ग्रहः pañcamī · ekavacanaRight context अलिटि saptamī · ekavacanaSubstitute / term prathamā · ekavacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- 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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Full reading
ग्रहः अलिटि
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The augment इट् added to वलादि आर्धधातुक affixes, becomes lengthened, except in the personal endings of the लिट् (Perfect Tense), after the root ग्रह।
As ग्रहीता, ग्रहीतुम्, ग्रहीतव्यम् ॥ Why not in the Perfect? Observe जगृहिव, जगृहिम् ॥ The lengthening takes place of the इट् taught in 7.2.35, and does not refer to the चिण्वद् इट् of 6.4.62 : as ग्राहिता, ग्रहिष्यते ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.