وَكَسْرُ مَا قَبْلَهَا فِي الْمُخَاطَبَةِ.
Translation: The preceding letter bears kasra in the feminine singular addressed form.
In the second-person feminine singular, the yāʾ is omitted before nūn and the preceding kasra remains as its signal.
Opening interactive controls...
Feminine Singular: Dropped Yāʾ
The Two Emphatic Nūns: Forms and Rules
وَكَسْرُ مَا قَبْلَهَا فِي الْمُخَاطَبَةِ.
Translation: The preceding letter bears kasra in the feminine singular addressed form.
In the second-person feminine singular, the yāʾ is omitted before nūn and the preceding kasra remains as its signal.