The y of a taddhita affix when preceded by a consonant and penultimate in a aṅga (stem), is elided before the feminine ī,
The anuvritti of \taddhita\ ceases, because of its mention in the next sutra. Hence this sutra applies to feminine ई only. As गार्गी, वात्सी from गार्ग्य and वात्स्य ॥ Why do we say 'when preceded by a consonant'? Observe कारिकेयी ॥ Why do we say 'of a Taddhita'. Observe वैद्यस्य भार्या = वैद्यी ॥,