उत्क उन्मनाः

Operational rule vidhi

The word उत्क is anomalous meaning 'longing after, yearning'.

Word by word (padaccheda)

Substitute / term उत्कः prathamā · ekavacanaSubstitute / term उन्मनाः prathamā · ekavacana

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

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Full reading

उत्कः उन्मनाः

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

Commentary

The word उत्क is anomalous meaning 'longing after, yearning'.
He whose mind anxiously desires or yearns after a thing is called उन्मनः ॥ The word उत्कः is formed by adding कन् to the preposition उद्. Thus उत्को देवदत्तः, उत्कः प्रवासी = उत्सुकः or उत्कण्ठितः ॥

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