Long ī is substituted for the final of a or ā of a Nominal stem, before the Denominative affix kyac ,
As पुत्रीयति, घटीयति, खट्वीयति, मालीयति ॥ This is an exception to 7.4.25. The separating of this aphorism from the preceding, is for the sake of the subsequent aphorism.,