7.4.25

अकृत्सार्वधातुकयोर्दीर्घः

लघुसिद्धान्तकौमुदी 481 · प्रकरण 12, which opens at लः कर्मणि च भावे चाकर्मकेभ्यः · rule 111 of 179 in it

a stem's final इक् vowel is lengthened before a य-initial affix that is neither कृत् nor सार्वधातुक

The final इक् vowel — इ, उ, ऋ or ऌ — of an अङ्ग (the stem an affix attaches to) is lengthened before a य-initial affix marked कित् or ङित् (carrying क् or ङ् as its इत्) that is neither a कृत् (a primary root-suffix) nor a सार्वधातुक (a present-system suffix). The passive sign यक्, the य added to make a passive stem, is such an affix, so a passive lengthens the stem vowel before it. गीयते "it is sung", from the root गै "sing", carries this long ई; by the time the chain reaches this rule the vowel is already long, so the derivation names it on a silent step where nothing further changes.

• Aṣṭādhyāyī — 7.4.25 अकृत्सार्वधातुकयोर्दीर्घः
• Bālānandinī (LSK, Telugu) — सूत्र 481 in the abridgement; vendor/balanandini-lsk-telugu-ocr.txt

uncheckeddrafted from the rule text and the Bālānandinī

वरदराज writes under it

अजन्ताङ्गस्य दीर्घो यादौ प्रत्यये न तु कृत्सार्वधातुकयोः । क्षीयात् ॥