आहो उताहो चानन्तरम्

Operational rule vidhi

Also after an immediately preceding आहो and उताहो when these follow, no other word, the verb retains its accent.

Word by word (padaccheda)

Indeclinable आहो avyayaIndeclinable उताहो avyayaIndeclinable च avyayaSubstitute / term अनन्तरम् prathamā · ekavacana

Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.

Full reading

आहो उताहो च अनन्तरम्

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

Commentary

Also after an immediately preceding आहो and उताहो when these follow, no other word, the verb retains its accent.
The prohibition of nighata or want of accentuation is understood here, so also there is the anuvritti of अपूर्वं from the last.

Thus आहो or उताहो भुङ्क्ते꣡, उताहो प꣡ठति ॥ Why do we say 'immediately preceding'? In the following sutra will be taught option, when these particles do not immediately precede the verb.

Why do we say "when no word precedes them"? Observe देवदत्त आहो or उताहो भुं॒क्ते॒ ॥

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