8.2.44
ल्वादिभ्यः
Operational rule vidhi
For the त of the निष्ठा there is substituted न after the roots लू and those that follow it.
Word by word (padaccheda)
Left context ल्वादिभ्यः pañcamī · bahuvacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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Full reading
ल्वादिभ्यः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
For the त of the निष्ठा there is substituted न after the roots लू and those that follow it.
These roots belong to Kryadi class, and commence from लूञ् छेदने (IX. 13) and end with वृ वरणे (IX. 32).
Thus लूनः, लूनवान्, धूनः, धूनवान्, जीनः, जीनवान् from ज्या the vocalisation is by 6.1.16.
Vart:- After a root ending in ऋ or ॠ and after a root of Luadi class, the त of the affix क्तिन् is changed to न्, like as in Nishtha. Thus कीर्णिः, गीर्णिः, शीर्णिः, लुनिः, पूनिः ॥ These are from कॄ (IX. 26), गॄ (IX. 28), शॄ (IX. 18), लू and पूञ् ॥
Vart:- The vowel of the roots दु गतौ (Bhuadi 991) and गु (Bhuadi 997), are lengthened before the Nishtha which is changed to न ॥ As आदूनः, विगूनः ॥
Vart:- The न change takes place after पूञ् 'to destroy' (Bhuadi I015). As पूना यवाः = विनष्टाः ॥ But पूतं धान्यं from पूञ् 'to purify' (IX. 12).
Vart:- The same change takes place after the root सि बन्धने of Svadi class (2) when used in a Reflexive sense of becoming a morsel fit for swallowing. As सिनो ग्रासः स्वयमेव i.e. where a morsel by being mixed with curd, condiments &c, becomes rounded of itself, there this form is used. बध्यमानः पिण्डीक्रियमाणो ग्रासो, यदा दध्यादिव्यञ्जन वशेन तत्रानुकूल्यं प्रतिपद्यते तदाऽयम् प्रयोगः ॥ But when not used in this sense, we have सिता पाशेन सूकरी ॥ Moreover, the ग्रास must be the object and not the subject of the verb. Therefore not here: सितो ग्रासो देवदत्तेन ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.