Rule. After tud and the roots that follow it, the affix śa comes, in its own sense, when a sārvadhātuka affix denoting the agent follows. It is an exception (apavāda) to śap. Bhaṭṭoji's commentators supply this setting.
The ś of śa is an it, so śa is śit and sārvadhātuka; only a is heard. It has no p, so by SK 2234 it is ṅit.
Example. The root tud "to pain".
tud + laṭ → tud + tip (endings as in chapter 44)
→ tud + śa + ti (this rule; śa instead of śap)
→ śa is apit, so ṅit (SK 2234) → no guṇa of the light penultimate u
→ tudati "he pains". With the ātmanepada: tudate.
Outside the present system śa is gone, and the root behaves normally:
- liṭ
tutoda, with guṇa. In thal,tutoditha: iṭ is obligatory here by the krādi restriction, since the root neither ends in a vowel nor has a. Ātmanepadatutude. - luṭ
tottā: the root takes no iṭ (it is aniṭ). - luṅ
atautsīt, with the vṛddhi taught for a consonant-final root; ātmanepadaatutta.
Applies when / blocked by. Why does guṇa not come first, before śa is added? Bhaṭṭoji's commentators answer that śa is nitya: it applies whether or not guṇa has applied. So it is made first, and then, being ṅit, it blocks guṇa. Scholars discuss a second ground for the same result.
Watch out. The present is tudati, never todati. That missing guṇa is the mark of the whole class.
The roots that follow. Bhaṭṭoji says six roots from tud on are svaritet. They are tud, ṇud, diś, bhrasj, kṣip and kṛṣ.
- ṇud "to impel" is taught with ṇ (ṇopadeśa), so its forms begin with n:
nudati,nudate,nunoda,nunude,nottā. - diś "to give" (Bhaṭṭoji glosses atisarjana as giving): luṭ
deṣṭā, with ṣ for ś by SK 294 and then ṭ for t. Āśīrliṅ ātmanepadadikṣīṣṭa: the affix is kit by SK 2300, so there is no guṇa. luṅadikṣat,adikṣata, with ksa by SK 2336. - bhrasj "to roast". One of Bhaṭṭoji's commentators says the cooking meant is roasting (bharjana), not the cooking of rice.
bhrasj + śa + ti
→ śa is ṅit, so SK 2412 gives saṃprasāraṇa: ṛ for the r, and the following a merges into it → bhṛsj + a + ti
→ the s becomes ś before the palatal j (ścutva) → bhṛśj + a + ti
→ the ś becomes j (jaśtva) → bhṛjjati "he roasts". Ātmanepada bhṛjjate.
Bhaṭṭoji's commentators close by setting up bhrasj + ṇal, the liṭ. That leads to the next rule.
(1281) tuda — in paining (vyathana). From here on, six [roots] have a svarita [vowel] as it-marker (svaritet). tudati [laṭ, parasmaipada, prathama-puruṣa singular]. tudate [laṭ, ātmanepada]. tutoda [liṭ, prathama-puruṣa singular]. tutoditha [liṭ, madhyama-puruṣa singular]. tutude [liṭ, ātmanepada]. tottā [luṭ]. atautsīt [luṅ, parasmaipada]. atutta [luṅ, ātmanepada]. (1282) ṇuda — in impelling (preraṇa). nudati. nudate [laṭ]. nunoda. nunude [liṭ]. nottā [luṭ]. (1283) diśa — in atisarjana. atisarjana is giving. deṣṭā [luṭ]. dikṣīṣṭa [āśīrliṅ, ātmanepada]. adikṣat, adikṣata [luṅ, parasmaipada and ātmanepada]. (1284) bhrasja — in cooking (pāka) [that is, roasting (bharjana)]. By grahijyā… (SK 2412) saṃprasāraṇa [of the r, since śa is ṅit]. [With bhṛsj-a-ti standing,] the s becomes ś by ścutva, and the ś becomes j by jaśtva: bhṛjjati, bhṛjjate [laṭ, parasmaipada and ātmanepada].
- commentary BM: 'kartrarthe sārvadhātuke pare tudādibhyaḥ śaḥ syāt svārthe' — śa comes after tud etc. when a sārvadhātuka denoting the agent follows, in its own sense; it is an exception to śap (śabapavādaḥ). BM also heads the section 'tiṅante tudādayaḥ — now the roots with śa as vikaraṇa are set out'. Followed: the bracketed setting in sutra_en.
- commentary BM on 'itaḥ ṣaṭ': that is, up to (but not including) 'ṛṣī gatau' — so the six svaritets are tud, ṇud, diś, bhrasj, kṣip, kṛṣ (1281–1286). Recorded; the English keeps Bhaṭṭoji's 'six'.
- commentary BM on tudati: śa, being nitya, is made first, setting aside the guṇa of the light penultimate (laghūpadhaguṇa); being apit it is ṅit by 'sārvadhātukam apit' [SK 2234], so there is no guṇa. tutoditha: the root neither ends in ac nor has a, so by the krādi restriction iṭ is obligatory even in thal of liṭ. tottā: the root is aniṭ. atautsīt: vṛddhi taught for a hal-final root (halantalakṣaṇā vṛddhi). Recorded (the kaumudī gives the forms only).
- commentary TB (sk.2534.t1, 'tudatīti'): some say śa, being nitya, sets aside the laghūpadha-guṇa even though that is para; others say guṇa does not apply by the paribhāṣā 'akṛtavyūhāḥ [pāṇinīyāḥ]'. Recorded; BM gives only the first reason (§16).
- commentary BM on ṇud and diś: ṇud is taught with ṇ (ṇopadeśa) and is aniṭ; diś too is aniṭ. deṣṭā: ṣ by 'vraśca…' [SK 294], then ṣṭutva; before sya, ṣ → k by 'ṣaḍhoḥ' and ṣatva: dekṣyati. dikṣīṣṭa: kit by 'liṅsicau' [SK 2300], so no guṇa. adikṣat: ksa by 'śala igupadhāt' [SK 2336]. Recorded.
- commentary TB (sk.2534.t1) on 'bhrasja pāke': the pāka meant here is roasting (bharjana), not the cooking of rice and the like, since the root is not used in that sense; on the reading 'bhrasjo' [with o as it] found in some, the n-substitute of the niṣṭhā by 'oditaś ca' would apply and bhṛṣṭaḥ, bhṛṣṭavān would not result. Followed: '[that is, roasting (bharjana)]'.
- commentary BM on bhrasj: aniṭ. With bhrasj-a-ti standing, since śa is ṅit, 'grahijyā…' gives ṛ as saṃprasāraṇa of the r, with pūrvarūpa [by saṃprasāraṇāc ca]; then with bhṛsj-a-ti standing, ścutva and jaśtva. BM closes by setting up ṇal ('ṇali bhrasj a iti sthite —') for the next sūtra. Followed: '[of the r, since śa is ṅit]' and '[With bhṛsj-a-ti standing,]'.
- textual Filing: this unit's TB ('tudatīti …', 'bhrasja pāke …'), printed after 'iti svādayaḥ' on NSP p. 408 (scan page-0418), was filed in ours at the tail of sk.2533.t1; it was re-filed here as sk.2534.t1 on 2026-10-05.
- textual Scan check, NSP p. 408 (scan page-0418, read): the kaumudī matches the print; the collation report (batch02) lists SK 2534 as clean. The print heads the gaṇa 'tiṅante tudādayaḥ 46' and prints '1282 tuda vyathane || itaḥ ṣaṭ svaritetaḥ ||' before the sūtra '2534 | tudādibhyaḥ śaḥ 3.1.77', with the forms after it; ours puts the dhātu line at the head of the unit. The print's dhātu numbers are one higher than ours (tuda 1282 … bhrasja 1285); ours are given as transmitted.
- translator The attribution of 'kartari' to kartari śap (SK 2167, which itself carries 'sārvadhātuke' from sārvadhātuke yak, SK 2756) is the translator's; BM supplies the sense without naming a source.
- translator The bracketed lakāra / pada / puruṣa labels are the translator's. Numbers 1281–1284 are the Dhātupāṭha serial numbers of our source. The kaumudī's 'ṇuda' is the upadeśa form; its forms begin with n.