3.1.18
सुखादिभ्यः कर्तृवेदनायाम्
Operational rule vidhi
The affix क्यङ् in the sense of 'feeling', comes after the words सुख 'pleasure' etc. when the pleasure etc. belong to the agent as feels thereof.
Word by word (padaccheda)
Left context सुखादिभ्यः pañcamī · bahuvacanaWord Right context वेदनायाम् saptamī · ekavacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- Word Case not marked in the source data.
- 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").
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Full reading
सुखादिभ्यः वेदनायाम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix क्यङ् in the sense of 'feeling', comes after the words सुख 'pleasure' etc. when the pleasure etc. belong to the agent as feels thereof.
Thus सुखायते ' he feels pleasure'; दुःखायते 'he feels pain'.
Why do we say 'when the feeling belongs to the agent'? Observe सुखं वेदयति प्रसाधको देवदत्तस्य 'the valet knows the happiness of his master Devadatta'. Here the agent viz. a valet, is not the percipient of the 'happiness', which belongs to his master; hence there is no affixing.
सुखादिः।
सुख, दुःख, तृप्त, गहन, कृच्छ्र, अस्, अलीक, प्रतीप, करुण, कृपण, सोट ।
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.