Idghām is the assimilation of one sound into the next so that the following consonant is pronounced as strengthened or doubled. Here the assimilated sound is that of sākin nūn or tanwīn.
The author groups six following letters under يَرْمَلُون. However, these do not all sound alike: some merge without sustained ghunnah, while others merge with ghunnah.
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Idghām: merging sounds
Sākin Nūn & Tanwīn — Iẓhār, Idghām, Qalb and Ikhfāʾ
Idghām is the assimilation of one sound into the next so that the following consonant is pronounced as strengthened or doubled. Here the assimilated sound is that of sākin nūn or tanwīn.
The author groups six following letters under يَرْمَلُون. However, these do not all sound alike: some merge without sustained ghunnah, while others merge with ghunnah.