7.3.95
तुरुस्तुशम्यमः सार्वधातुके
Operational rule vidhi
A हलादि सार्वधातुक तिङ् प्रत्यय optionally gets an ईट् आगम when it is attached to the verbs तु, रु, स्तु, शम्, अम्
Word by word (padaccheda)
Left context तुरुस्तुशम्यमः pañcamī · ekavacanaRight context saptamī · ekavacana
- Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
- 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, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.
Full reading
तुरुस्तुशम्यमः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
A सार्वधातुक affix beginning with a consonant, optionally get the augment इट् after the roots 1. तु 2. रु 3. स्तु 4. शम् and 5. अम्।
The root तु (Adadi 25) means 'to increase', रु (Adadi 24) 'to make a sound', स्तु (Adadi 34) 'to praise', शम् 'to be satisfied', and अम् 'to go'. According to Kasika तु is a Sautra dhatu. Thus उत्तौति or उत्तवीति, उपरौति or उपरवीति, उपस्तौति or उपस्तवीति, शाम्यध्वम् or शमीध्वम्, अभ्यमति or अभ्यमीति ॥ शम् and अम् can then be followed by a consonant beginning sarvadhatuka affix, when they lose their Present character (vikarana) as a Vedic anomaly (bahulam chhandasi).
The Apisalas read the sutra as तुरुस्तुशम्यमः सार्वधातुकासुच्छन्दसि ॥ This will then become a विधि rule for the Vedic forms. The word सार्वधातुका is here exhibited in the feminine.
The repetition of 'sarvadhatuka', though its anuvritti was present is for the sake of stopping the anuvritti of पित्, and this rule applies to अपित् affixes also, as सुवीत, शमाध्वम् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.