Even so from a new derivative from this stem ending in ḍha, formed with a taddhita affix having an indicatory ñ , ṇ or k there is vṛddhi substitution for the first vowel of the second member and optionally for the first vowel of the first member in pravāhaṇeya and prāvāhaṇeya,
As प्रवाहणेयस्यापत्यं = प्रावाहणेयिः or प्रवाहणेयिः, प्रा or प्र-वाहणेयकम् ॥,