उद ईत्

Operational rule vidhi

If the word अच् - (1) happens to be derived from the धातु अञ्च् (गतौ) , (2) follows the word उद्, and (3) gets the भसंज्ञा, then the अकार of अच् is converted to ईकार.

Word by word (padaccheda)

Left context उदः pañcamī · ekavacanaSubstitute / term ईत् 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.

Full reading

उदः ईत्

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

Commentary

The long ई is substituted for the अ of अच् (अञ्च् ) after the word उत् when the अङ्ग (stem) is भ।
As उदीचः, उदीचा, उदीचे ॥

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