The affix ṅīp is used in forming the feminine after prātipadika (Nominal Stem) ending in ṛ or n,
Of the affix ङीप्, the letter ङ् is taken in order to make a common term with ङीष् and ङीन्; and the प् is taken to distinguish ti from those affixes; the real affix is ई । Thus, कर्तृ;-- f. कर्त्री; हर्तृ—f. हर्त्री; दण्डिन्—f. दण्डिनी; छत्रिन्,-- f. छत्रिनी ॥,