बहुलं छन्दसि

Operational rule vidhi

In the छन्दस् (Vedas), the उर् substitution for ॠ of a root-stem is diverse.

Word by word (padaccheda)

Substitute / term बहुलम् prathamā · ekavacanaRight context छन्दसि saptamī · ekavacana

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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

बहुलम् छन्दसि

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

In the छन्दस् (Vedas), the उर् substitution for ॠ of a root-stem is diverse.
That is, it takes place even when the preceding letter is not labial, and does not take place even when the letter is labial. Thus मित्रा वरुणौ ततुरिः, दूरे ह्यध्वा जगुरिः, पप्रितमम् (no change), and पपुरिः, from तॄ, गॄ and पॄ ॥ All these words ततुरिः, जगुरिः and पप्रि are formed by the affix किन् 3.1.171.

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.