अनुदात्तादेरञ्

Operational rule vidhi

For the words whose first vowel is अनुदात्त, the अञ् प्रत्यय is added in the meaning of 'तस्य समूहः'.

Word by word (padaccheda)

Left context - आदेः pañcamī · ekavacanaSubstitute / term अ prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Dotted words are technical terms. Hover or tap one to see its card.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

-आदेः अञ्

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

Commentary

The affix अञ् comes in the sense of 'collection thereof' after the words having अनुदात्त on the first syllable.
Thus कपोतानां समूहः = कापोतम्, मायूरम्, तैत्तिरम् ॥

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