Grammatical Sūtra: नित्यं छन्दसि nityaṃ chandasi
Individual Word Components: nityam chandasi
Sūtra with anuvṛtti words: nityam chandasi aṅgasya (6.4.1), ṇau (7.4.1), caṅi (7.4.1), upadhāyāḥ (7.4.1), uḥ (7.4.7), ṛt (7.4.7)
Type of Rule: vidhi
Preceding adhikāra rule:7.3.10 (1uttarapadasya)

Description:

Short ((ṛ)) is invariably substituted in the Veda, for the penultimate ((ṛ)) or ((ṛ)) of a Causative stem, in the Reduplicated Aorist. Source: Aṣṭādhyāyī 2.0

In the Chándas [the substitute short vowel r̥(T) 7] necessarily (nítya-m) replaces [the áṅga 6.4.1 penultimate vowel 1 r̥ 7 before 1.1.66 the Aorist substitute marker CáṄ co-occurring after the causative marker ṆíC 1]. 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: 7.4.1, 7.4.7

Kāśikāvṛttī¹: chandasi viṣaye ṇau caṅi upadhāyā ṛvarṇasya sthāne ṛkarādeśo bhavati nityam. avī   See More

Kāśikāvṛttī²: nityaṃ chandasi 7.4.8 chandasi viṣaye ṇau caṅi upadhāyā ṛvarṇasya sthāne ṛkarād   See More

Nyāsa²: nityaṃ chandasi. , 7.4.8 "avīvṛdhat()" iti. "vṛdhu vṛddhau"    See More

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