3.1.74
श्रुवः शृ च
Operational rule vidhi
In presence of a सार्वधातुक प्रत्यय in the कर्तरि प्रयोग, the verb श्रु is converted to शृ and it gets the श्नु विकरणप्रत्यय.
Word by word (padaccheda)
Target श्रुवः ṣaṣṭhī · ekavacanaWord शृ Indeclinable च avyaya
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Word Case not marked in the source data.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
श्रुवः शृ च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
And शृ is the substitute of श्नु and there is the affix श्नु after it, when a सार्वधातुक affix denoting an agent follows.
Thus श्रु + श्नु + तिप् = शृ + नु + ति = शृणोति 'he hears'; शृणुतः: 'they two hear'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.