दंशसञ्जस्वञ्जां शपि

Operational rule vidhi

The उपधा-नकार of the verbs दंश्, सञ्ज् and स्वञ्ज् is removed in presence of the विकरणप्रत्यय शप् .

Word by word (padaccheda)

Target दन्श- सञ्ज- स्वञ्जाम् ṣaṣṭhī · bahuvacanaRight context शपि saptamī · ekavacana

Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").

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

Full reading

दन्श-सञ्ज-स्वञ्जाम् शपि

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

Commentary

The nasal of 1. दंश् 2. संज् and 3. स्वञ्ज is elided before the गणविकरण शप् of the roots of the भ्वादिगणः (1st Conjugation).
Thus दशति, सजति and परिष्वजते for the change of the स् of स्वञ्ज् to ष see 8.3.65

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