Rule. The affix yaṅ comes after a dhātu that has a single vowel (ekāc) and begins with a consonant (halādi). It comes when kriyāsamabhihāra is to be made manifest. Bhaṭṭoji's gloss: "kriyāsamabhihāra is repetition (paunaḥpunya) and the sense of intensity (bhṛśa); when that is to be made manifest, let yaṅ come".
In yaṅ, the ṅ is a marker (it). What is added is ya.
The word is "made manifest" (dyotya), not "denoted" (vācya). One of Bhaṭṭoji's commentators gives the reason. What an affix denotes is the principal meaning, the thing qualified (viśeṣya). Desire is that in a desiderative. If yaṅ denoted the repetition, the repetition would become the principal meaning. So yaṅ only makes it manifest.
Example.
bhū "to become" has one vowel, ū, and begins with the consonant bh. "It becomes again and again, or intensely":
bhū + yaṅ (this rule); ṅ is a marker → bhū ya
→ yaṅ is marked with ṅ, so the root's ū takes no guṇa (SK 2217)
→ bhūya ends in yaṅ, so it is a dhātu (SK 2304)
→ the form ending in yaṅ is doubled (SK 2395) → bhū bhū ya
→ the abhyāsa's vowel is shortened (SK 2180) → bhu bhū ya
→ bh in the abhyāsa becomes b (SK 2182) → bu bhū ya
→ guṇa of the abhyāsa's u (SK 2630) → bo bhū ya
→ laṭ; the ātmanepada ending ta, because the stem ends in a ṅ-marked affix (SK 2157) → bobhūya + ta
→ śap (SK 2167) → bobhūya + a + ta
→ a + a → a (pararūpa, SK 191) → bobhūyata
→ the final a of the ending becomes e (SK 2233) → bobhūyate.
Applies when / blocked by. Bhaṭṭoji tests each word of the rule under the next sūtra, SK 2630.
- "Single vowel": with jāgṛ "to wake", which has two vowels, there is no yaṅ. One says
punaḥ punar jāgarti"he wakes again and again". - "Beginning with a consonant": with īkṣ "to look", which begins with a vowel, there is no yaṅ. One says
bhṛśam īkṣate"he looks intensely". - "After a dhātu": this word makes yaṅ an ārdhadhātuka affix (SK 2187). The reason is given under SK 2630.
Can yaṅ come where a word like bhṛśam "intensely" already says the same? Yes, one of Bhaṭṭoji's commentators says. Yaṅ only makes the sense manifest, and what is already expressed can still be made manifest.
But Bhaṭṭoji reports a limit from the Bhāṣya. With ruc "to shine" and śubh "to be beautiful", yaṅ does not come in the sense of intensity. So bhṛśaṃ rocate, bhṛśaṃ śobhate. In repetition it does come: rorucyate, śośubhyate. One of Bhaṭṭoji's commentators gives the ground: the intensity is simply not expressed this way (anabhidhāna), as the Bhāṣya makes clear.
Vārttika. sūcisūtrimūtryaṭyartyaśūrṇotibhyo yaṅ vācyaḥ: "yaṅ should be stated after sūci, sūtri, mūtri, aṭ, ṛ, aśū and ūrṇu". These roots fail the sūtra's tests, one of Bhaṭṭoji's commentators explains.
- sūci "to inform against", sūtri "to wind", mūtri "to pass urine" have more than one vowel.
- aṭ "to go", ṛ "to go", aśū "to pervade" begin with a vowel.
- ūrṇu fails both tests.
Their forms are taught under SK 2630–2633.
Watch out. Yaṅ adds no new meaning that becomes the main one. "He becomes" is still about becoming; yaṅ only colours it as repeated or intense. Contrast the desiderative of chapter 55, where the wish is the main meaning.
kriyāsamabhihāra is repetition (paunaḥpunya) and the sense of intensity (bhṛśa). When that is to be made manifest (dyotya), let yaṅ come [after a dhātu of a single vowel that begins with a hal].
- commentary BM (absent from our source.json; read in Wikisource uttara-2/0127) on 'tasmin dyotye': if kriyāsamabhihāra were denoted (vācya) by yaṅ, then, since what a pratyaya denotes is the principal [meaning], it would be the qualificand (viśeṣya), as desire is in a sannanta form. It is therefore only made manifest. Followed: 'to be made manifest (dyotya)', and the same in sutra_en.
- commentary TB (sk.2629.t1, lemma 'dhātor ekāco—'; re-filed from the tail of sk.2628.t1 on 2026-10-05): because 'kriyāsamabhihāre' is said, [yaṅ] would come after a dhātu only and not after a prātipadika; hence the question 'dhātoḥ kim', which Bhaṭṭoji answers under SK 2630. Recorded; the English of this block is not affected.
- textual Neighbour-filed commentary: this unit has no BM in our source.json. Its TB, together with the TB on SK 2630 ('dhātoḥ kim', 'bruvo vacir ity ādi'), stood at the tail of sk.2628.t1 and was re-filed as sk.2629.t1 on 2026-10-05. BM is missing from our source for the whole yaṅ-prakaraṇa: sk.2628.b1 goes from the end of BM on the sannanta-prakriyā to the heading of the śaiṣika section (the BM on the sarvasamāsaśeṣa that stood between them was re-filed to sk.p22.prose.b1). The BM was read in Wikisource uttara-2/0127–0132.
- textual The kaumudī agrees with NSP p. 437 (scan page-0447, read), where the heading 'tiṅante yaṅantaprakriyā 53' stands before this sūtra.