In لَيُنْبَذَنَّ, the first nūn sākinah meets bāʾ, triggering iqlāb: its sound changes toward mīm with nasalization. The muṣḥaf indicates this in «لَيُنۢبَذَنَّ».
Later in the same word, the final doubled nūn also requires ghunnah, but for a different reason: shaddah on nūn. Explain which ghunnah is caused by the following bāʾ and which by nūn's own doubling.
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La-yunbadhanna: iqlāb plus doubled nūn
Al-Māʿūn and Al-Humazah: Applied Assimilation, Concealment, Madd and Hāʾ Rules
In لَيُنْبَذَنَّ, the first nūn sākinah meets bāʾ, triggering iqlāb: its sound changes toward mīm with nasalization. The muṣḥaf indicates this in «لَيُنۢبَذَنَّ».
Later in the same word, the final doubled nūn also requires ghunnah, but for a different reason: shaddah on nūn. Explain which ghunnah is caused by the following bāʾ and which by nūn's own doubling.