Grammatical Sūtra: सुञः suñaḥ
Individual Word Components: suñaḥ
Sūtra with anuvṛtti words: suñaḥ pūrvatra (8.2.1), asiddham (8.2.1), saṁhitāyām (8.2.108), apadāntasya (8.3.55), mūrdhanyaḥ (8.3.55), saḥ (8.3.56), iṇkoḥ (8.3.57), chandasi (8.3.103), pūrvapadāt (8.3.104)
Type of Rule: vidhi
Preceding adhikāra rule:8.3.64 (1sthādiṣv abhyāsena ca abhyāsasya)

Description:

The ((sa)) of the Particle ((su)) is changed to ((ṣa)) in the Chhandas, when preceded by another word having in it the change-effecting letter ((i)) &c. Source: Aṣṭādhyāyī 2.0

[In the domain of Chándas 105 the substitute retroflex 55 sibilant ṣ 39 replaces the dental sibilant s 56 of the particle] súÑ [occurring after 1.1.67 a prior padá 106 ending in a vowel other than the phoneme-class /a/ 57' in continuous utterance 2.108]. Source: From Aṣṭādhyāyī of Pāṇini In Roman Transliteration translated by Sumitra M. Katre, Copyright © 1987. Courtesy of the University of Texas Press.

Source:Srisa Chandra Vasu's Aṣṭādhyāyī of Pāṇini

Anuvṛtti: 8.3.55, 8.3.57, 8.3.105, 8.3.106, 8.3.56

Kāśikāvṛttī¹: pṛtanā ṛta ityetābhyām uttarasya sahisakārasya mūrdhanyādeśo bhavati. pṛtanāṣāha   See More

Kāśikāvṛttī²: suñaḥ 8.3.105 suñiti nipāta iha gṛhyate, tasya pūrvapadasthānnimittātuttarasya    See More

Nyāsa²: stutastomayośchandasi. , 8.3.107 "sātpadādyoḥ" 8.3.113 iti pratiṣedhe    See More

1.Source: Arsha Vidya Gurukulam
2.Source: Sanskrit Documents