Grammatical Sūtra: उदि श्रयतियौतिपूद्रुवः udi śrayatiyautipūdruvaḥ 
Individual Word Components: udi śrayatiyautipūdruvaḥ
Sūtra with anuvṛtti words: udi śrayatiyautipūdruvaḥ pratyayaḥ (3.1.1), paraḥ (3.1.2), ca (3.1.2), ādyudāttaḥ (3.1.3), ca (3.1.3), dhātoḥ (3.1.91), kṛt (3.1.93), kriyāyām (3.3.10), kriyārthāyām (3.3.10), ghañ (3.3.16), bhāve (3.3.18), akartari (3.3.19), ca (3.3.19), kārake (3.3.19), saṃjñāyām (3.3.19)
Type of Rule: vidhi
Preceding adhikāra rule:3.2.134 (1ā kveḥ tacchīlataddharmatatsādhukāriṣu)
Description:
The affix 'ghañ' comes after the verbs 'śri', 'yu', 'pû' and 'dru', when the preposition 'ut' is in composition. Source: Aṣṭādhyāyī 2.0
[The kŕt 1.93 affix 1.1 GHaÑ 16 is introduced after 1.2 the verbal stems 1.91] śri- `rest, lean on, take refuge in, resort to', yu- `mix' (II 23), pū- `purify'(1.1.15, IX 12) and dru- `run' (I 992) co-occurring with the preverb úd-° [to form an action noun 18 denoting a kāraka other than the agent 19]. Source: From Aṣṭādhyāyī of Pāṇini In Roman Transliteration translated by Sumitra M. Katre, Copyright © 1987. Courtesy of the University of Texas Press.