3.3.129
छन्दसि गत्यर्थेभ्यः
Operational rule vidhi
The affix युच् comes in the छन्दस् (Vedas) after the roots having the sense of 'to go' when the word ईषद् etc. meaning 'lightly' or 'with difficulty' are in composition with such verbs.
Word by word (padaccheda)
Right context छन्दसि saptamī · ekavacanaLeft context गत्यर्थेभ्यः pañcamī · bahuvacana
- 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").
- 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
छन्दसि गत्यर्थेभ्यः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix युच् comes in the छन्दस् (Vedas) after the roots having the sense of 'to go' when the word ईषद् etc. meaning 'lightly' or 'with difficulty' are in composition with such verbs.
This debars the affix खल्. Thus सूपसदनोऽग्निः । सूपसदनमन्तरिक्षम् । See T.S. 7.5. 20. I
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.