The feminine affix ti comes after the prātipadika (Nominal Stem) yuvan and this affix gets the name taddhita,
As युवतिः 'a young maid'. By 4.1.5, ङीप् would have been otherwise employed, the present sutra debars it. The word युवति ending in इ does not take the affix ङीष् of 4.1.65, for the affix ति itself is a feminine-making affix though a Taddhita: or the word युवन् may be regarded as a non-jati word and hence 4.1.65 would not apply.,