In لَتَرَوُنَّهَا, the doubled nūn requires ghunnah and هَا contains a written madd alif.
This «hā» represents a feminine object pronoun; do not label its alif as the special ṣilah of hāʾ al-kināyah or invent an additional wāw/yāʾ. The elongation here comes from the actual alif after hāʾ.
Mark the nasal hold on nūn separately from the madd of «hā».
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Ghunnah and hā-alif in la-tarawunnahā
Al-ʿAṣr and At-Takāthur: Applied Ghunnah, Madd, Lām and Waqf
In لَتَرَوُنَّهَا, the doubled nūn requires ghunnah and هَا contains a written madd alif.
This «hā» represents a feminine object pronoun; do not label its alif as the special ṣilah of hāʾ al-kināyah or invent an additional wāw/yāʾ. The elongation here comes from the actual alif after hāʾ.
Mark the nasal hold on nūn separately from the madd of «hā».