3.2.82
मनः
Operational rule vidhi
The affix णिनि comes after the verb मन् 'to think' when there is a word with a case-affix in composition with it.
Word by word (padaccheda)
Left context मनः pañcamī · ekavacana
- 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
मनः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix णिनि comes after the verb मन् 'to think' when there is a word with a case-affix in composition with it.
The word 'supi' is understood in this sutra. As दर्शनीयमानी 'who thinks himself handsome'; शोभनम्मानी 'who thinks himself beautiful'.
The verb मन् belonging to the 4th conjugation is taken here and not that belonging to the 8th conjugation; because the anuvritti of the word 'diversely' is understood here. In the present aphorism, whether we take the Divadi or Tanadi मन् the resulting form would be the same, namely मानिन्. But not so in the next aphorism, where before the affix खश् there would be difference of form owing to the vikarana i. e., in the 4th conjugation श्यन् would be added, but not so if the verb belonged to the 8th class.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.