The khayshūm is the inner nasal passage. The author's fourteenth point associates it with ghunnah, mentioning hidden nūn and a form of incomplete assimilation involving mīm. Ghunnah is a nasal resonance, not an additional written Arabic letter.
Notice the nasal component while practicing nūn or mīm. Do not assume every context of these letters has the same duration or nasal prominence; the relevant rules will be studied in later lessons.
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Point 14: Nasal passage and ghunnah
Makhārij al-Ḥurūf — The Fifteen Articulation Points
The khayshūm is the inner nasal passage. The author's fourteenth point associates it with ghunnah, mentioning hidden nūn and a form of incomplete assimilation involving mīm. Ghunnah is a nasal resonance, not an additional written Arabic letter.
Notice the nasal component while practicing nūn or mīm. Do not assume every context of these letters has the same duration or nasal prominence; the relevant rules will be studied in later lessons.